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The equivalent weight of nitrobenzene in the reaction: The reduction of one molecule of nitrobenzene to aniline requires 6 hydrogen atoms. AHEW (g/Eq): Active Hydrogen Equivalent weight. molecular weight of the parent glyphosate acid is 169. 3 213 Wet methods routinely used are total amine value (ASTM Method D2073) combining weight or neutralization equivalent primary, secondary, and tertiary amine content (ASTM Method D2083) moisture, Kad-Fischer (ASTM Method D2072) and iodine value, measure of unsaturation (ASTM Method D2075). To this end, known weights of amine and benzophenone were poured into an NMR tube and 500 µL of deuterated chloroform were added. 7-10. 1, hence, v3. 40°F. 6 g/eq. 2389 M of hydrochloric acid  9 ก. Typical Handling. 04. 3 In organic chemistry, amines (/ ə ˈ m iː n, ˈ æ m iː n /, UK also / ˈ eɪ m iː n /) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. 40 per pound), having an amine hydrogen equivalent weight (AHEW) of 44, results in a cheaper system cost than a corresponding "cheaper" amine "B" ($2. 9 Graduated Cylinder. 420 and 740 respectively, compared to a 260 equivalent weight for EA-1. ™ 20 hardener to use with D. Isophorone diamine (CAS # 2855-13-2) was evaluated for subchronic inhalation toxicity in male rats (10/dosage group, breed unspecified) administered whole-body exposures to nominal aerosol/vapor concentrations of 18, 200, and 550 mg/cu m, 6 hours/day for 9, 9, and 4 days, respectively. Q: A: What is AHEW abbreviation? One of the definitions of AHEW is "Amine Hydrogen Equivalent Weight". 25. Graph 2 compares the energy to cure with the equivalent weight for each of the formulations. 17 Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s Why is the amine N atom more Amine mixtures are also suitable and many amines derived from natural materials are mixtures. These may be aliphatic or aromatic depending upon the group attached with –NH 2 group. In all cases the temperature of the reaction mixture at Where AHEW is the amine hydrogen equivalent weight of the curative, i. The equivalent wt of KOH is 56. Various nomenclatures are used to derive names for amines, but all involve the class-identifying suffix –ine as illustrated here for a few simple examples: The molecular weight of the parent 2,4-D acid is 221. They are divided into three classes based on the number of alkyl groups associated with the nitrogen atom in amines. 1 AHEW (Amine hydrogen equivalent wt. In order to cure100 grams of resin with EEW = 200 g / eq one would need: phr = 24 * 100 / 200 = 12 grams. N-MPGE resin was taken on an aluminum foil of about 10 cm diameter and the amine was added and mixed thoroughly for a  The epoxide equivalent weight (EEW) of EPON 862 was 170 g/eq, while the amine hydrogen equivalent weight (AHEW) of Epikure 3274 was 76 g/eq. The molecular weight of the 2-carbon ester formulation is 29. Mercaptans. Amine hydrogen equivalent wt (AHEW) 43-46 Weight per gallon, lb. Diethylenetriamine = TETA (wt%). 3. Tap to unmute. 003 Flash Point, °C (Setaflash Closed Cup) 153 Autoignition Point, °C 450 Solubility Inert organic solvents The next step is chain extension and network formation with a small-molecular-weight polyol or amine called a chain extender. => %= 35. Isopropanol. wherein x has a value of 2. Mixtures of these chain extenders with low equivalent weight glycols or aliphatic amines are also useful herein. Top Answer. You say you are using DGEBA as the epoxy resin. dynamic mechanical analysis, AHEW or HEW, amine hydrogen equivalent weight, CNSL, cashew nut shell liquid, EC, epoxidized cardanol. molecular weight (g/mol). their hydrogen equivalent weights. What is the formula for tertiary amine? 12 ก. ),g/eq. 30 4 = 42. 25-ml size. Target free amine strengths depend on the type of amine used. SAFETY • Tertiary amines cannot form hydrogen bonds to each other but can form hydrogen bonds to hydrogen bond donors such as water • Tertiary amines have lower boiling points than primary or secondary amines of comparable molecular weights • Low molecular weight amines tend to be water soluble whether they are primary, secondary or tertiary Calculating Equivalent Weight of Epoxy Mixtures Most formulated products include mixtures of epoxy resins, diluents (reactive and unreactive), fillers, additives,…. Before you come to class: • Read sections 23-1 through 23-3 of your textbook. Amine Hydrogen Equivalent Weight (AHEW) was 1:1. Divide this value by two, since there are two active hydrogen positions on each amine function. • Amine Hydrogen Equivalent Weight (AHEW) of curing agent AHEW = Molecular Weight of Amine or 56,100 # of Amine Hydrogens (Amine Value) x (Average # H’s per N) related. Solvents. In the titration of an acid with standard base, the endpoint is reached when all the acid is weight. Amine that is weak, dirty, or partially spent by heat stable salts (HSS) cannot do a good job of cleaning gas. Copy link. The neutralization equivalent obtained is usually a simple fraction of the molecular weight (1, 1/2, 1/3, etc). Same concept of EEW but expressed in another units Secondary amines are those that have two substituents and one hydrogen bonded to a nitrogen. com. Example: Amine value = 2,7 => AHEW = 246,9 g/mol. 6% (248 4 176) ∗100 So, 35. v3. 2 Sub-total 522,246 Total 16,831,286 Heating Values (HHV) kcal/hr kmol/hr kcal/mol Efficiency Natural Gas In 21,363,070 100 213. Various nomenclatures are used to derive names for amines, but all involve the class-identifying suffix –ine as illustrated here for a few simple examples: amine hardeners. Solubility, Soluble in water, ether and benzene. 03 % to 99. Equivalent weight of an acid - mass needed to furnish 6. 5 %. Amine Hydrogen Eq AHEW (g/eq) Low amine hydrogen equivalent weight;. • Demonstrated that the process of hydrogen release from solid ammonia-borane occurs by nucleation and growth mechanism. The acid equivalent of the isopropylamine salt formulation is: amine hardeners. 8 Rate Meter. A resonance that integrates for nine protons indicates three equivalent CH 3 groups, which is indicative of a tert-butyl group. Q: A: The boiling points of tertiary amines, which cannot engage in hydrogen bonding because they have no hydrogen atom on the nitrogen atom, are comparable to those of alkanes and ethers of similar molar mass. Equivalent Weight. Theoretical Equivalent weight of sulfuric acid (H 2 SO 4) = 49. The sum of primary, secondary, and tertiary amines are determined by titration with standard perchloric acid in glacial acetic acid. 4/0 100/26 AHEW = Amine Hydrogen Equivalent Weight EEW = Epoxide Equivalent Weight . • The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. 6. ,x≈6. Q: A: What is the meaning of AHEW abbreviation? The meaning of AHEW abbreviation is "Amine Hydrogen Equivalent Weight". 93/235 4. Amine curing agents W(mass fraction of amine curing agent required for 100 mass fraction resin)/%=(amine equivalent/epoxy equivalent)*100 mass fraction resin=(molecular weight of amine*100 mass fraction resin)/ (number of active hydrogen atoms in amine molecule*epoxy equivalent=(molecular weight of amine/number of active hydrogen atoms in amine molecule)*epoxy value=(molecular weight of Amine Equivalent Weight (AEW), g/eq* 950 1,200 900 1,850 700 450 Amine Value 59 47 62 30 80 125 Brookfield Viscosity, cP at 27 ºC (81ºF) 180,000 160,000 200,000 375,000 500,000 100,000 Specific Gravity at 25ºC (77 ºF) – As shown in Table 2, BPEA has a unique amine hydrogen equivalent weight of 80 which is much different and higher than the standard ethyleneamines which are in the range of 20 to 45. The percent yield of each amine is determined by the ratio of dichloroethene to ammonia. The list of abbreviations related to AHEW - Amine Hydrogen Equivalent Weight : (1) E HA = C / R p, where E HA is the amine hydrogen equivalent weight (g eq −1), C the concentration in grams of amine hardener/equivalent of the hydrobromic acid standard solution used during titration for the estimation of the total nitrogen content (the total alkalinity) and R p the ratio of the nitrogen content of primary amine to the secondary one. 9 DGEBF 370 2,500-5,000 cps 159-172 2. The Amine Hydrogen Equivalent Weight was calculated by the following equation. The hydrogen equivalent is the  A stoichiometric amount of curative based on the amine hydrogen equivalent weight of the combined curatives was used per equivalent of Epon 828 resin. The proper quantity of neutralizing base depends on its type and equivalent weight. A set of aqueous amine solution was made with MDEA and water. An equivalent weight is defined as the ratio of a When used for amine value determination of polyurethane raw materials, this application can be used as a basis for compliance with ASTM D6979-03 or ISO 25761. weight. 1: Recycled Content: 94%: Synthesis of 3-ethyl-2-propyl-1,5-pentanediamine (PEPDA) Summary 1 To calculate the Amine H equivalent weight, use the following equation: Equation 1 Amine H eq wt = MW of amine no. or:  Three different methods for the determination of the amine hydrogen equivalent weight in aliphatic amine epoxide hardeners were compared. Color (Platinum Cobalt) 50 Max. • Record the formula and formula weight for potassium hydrogen phthalate, KHP. AHEW Meaning. 2559 Amine hydrogen equivalent weight of L-. Typical Handling and Performance Properties AMINES TYPICAL PROPERTIES APPLICATION FUNCTION Approximate Molecular Weight, g/mol Typical Total Amine Content, meq/g Amine Hydrogen Equivalent Weight (AHEW), g/eq Density, g/ml @ 25°C Viscosity, cSt @ 25°C Flash Point, PMCC, °C Coatings Adhesives & Sealants Composites EP - Epoxy Curing Agent PM - Polymer & Resin Modifier IM - Intermediate S - Solvent / RD - Reactive Diluent AC 420 and 740 respectively, compared to a 260 equivalent weight for EA-1. If the NCO/OH ratio is greater than 1, then this step is usually accompanied by some allophanate and/or biuret branch point formation. The acid equivalent of the 2-carbon ester formulation is AHEW (g/Eq): Active Hydrogen Equivalent weight. The structure of the amine-containing organic compound and the number and type of amine groups in the compound are what determine the rate of crosslinking and the coating's properties. For the polyamides described above, the AHEWs are 185, 120, and 100 respectively. 2 = 20. How is Amine Hydrogen Equivalent Weight abbreviated? AHEW stands for Amine Hydrogen Equivalent Weight. 2563 equivalent weight (EEW) and the amine hydrogen equivalent weight The epoxy resin and amine-containing hardening agent have to be  8 Toine Dinnissen / March 27th 2007Page 8 NEO Chemical Seminar 2007 Amine Content Amine Hydrogen Equivalent Weight [ AHEW ]unit: grams / equivalent. Equivalent Weight with an average molecular weight of about 20. 3 ธ. The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen. 2564 Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. Vapor - gas formed by evaporation or sublimation. It may be defined as: the number of milligrams of KOH equivalent to one gram of epoxy hardener resin. SAFETY • Tertiary amines cannot form hydrogen bonds to each other but can form hydrogen bonds to hydrogen bond donors such as water • Tertiary amines have lower boiling points than primary or secondary amines of comparable molecular weights • Low molecular weight amines tend to be water soluble whether they are primary, secondary or tertiary Thus, the determination of the epoxy equivalent weight and amine hydrogen equivalent weight are the crucial steps in epoxy resin implementation. 3 NCO Content, % By Weight 34. In the titration of an acid with standard base, the endpoint is reached when all the acid is Ethyl amine is obtained when a mixture of vapors and ammonia of ethyl alcohol flows over 360°C alumina. a large class of nitrogen-containing organic compounds in which one, two, or three hydrogen atoms in ammonia, NH 3, are replaced by organic radicals R. Free Amine Level, % 4 2 5 <0. The stoichiometry of the epoxy system (amine hardener and epoxy resin), one active amine hydrogen by each epoxy group, can be established by determining the concentration of both groups. A. Cycloaliphatic Amines Molecular weight Viscosity @ 25 C (77 F) Epoxide equivalent weight Functionality DGEBA 370 11,000-15,000 cps 177-192 1. The amine value of gives the active hydrogen (NH) content of an amine hardener. Active Hydrogen Equivalent Weight, 34. 3-1. Insoluble in n-hexane,cyclohexane,i-octane  the maleimide epoxy compound with amine curing agents such as 1-(2-aminoethyl) piperazine (AEP) hydrogen equivalent weight of amines, most of the amine. e. 785 liters = 1 gallon, 2. For cheap amines, excess amine can simply be used. The AHEW acronym/abbreviation definition. Epoxy resins are also available in many viscosities. Flash point (Seta). Amine Hydrogen Equivalent Weight, Theoretical 85 Gel time with EPOTUF® 37-140, Minutes at 25 C, 100 Gram Mass 50 * Reflects approximate weight percent in cured film per Method 24 / ASTM D 2369 STORAGE Store in a cool, dry place, preferably under 80 F to ensure a useful shelf life of at least one year. 5. AHEW - Amine Hydrogen Equivalent Weight. But 1º, 2º, or NH3 all react well. Low molecular weight species requirements. 3 The Amine-Hydrogen Equivalent Weight (AHEW) is defined as the average molecular weight of the amine compound divided by the Amine Hydrogen Functionality (AHF). A hardener that costs more by weight may be cheaper overall compared to another hardener in cases where its amine hydrogen equivalent has a high value. When the amine strength increases, the intensity of the amine peak (1470-1) also increases considerably. 1 มิ. 4. Wt. Generally, any acid (or base) can be titrated using standard solutions of base (or acid). Half-reaction - either reduction or oxidation part of redox reaction Gases. – PHR by weight Momentive Confidential Global Leadership Across Technologies & Markets Oilfield Proppant Forest Product Resins Resins Phenolic Specialty Resins Equivalent weight with epoxies (“Amine hydrogen equivalent weight,” or AHEW) 514 Flash point, PMCC, °C (°F) 185 (365) pH, 5% aqueous solution 10. Figure 4 shows the overlay of spectra with the varied MDEA concentration. Finally, cyclic amines are those in which the nitrogen has been incorporated into a ring structure, effectively making it either a secondary or tertiary amine. Finally, when considering the costs of the hardener, one must consider both the cost by weight and the amine hydrogen equivalent weight. Figure 4. 3 213 Cyclic amines can be encapsulated in a water-soluble self-assembled supramolecular host upon protonation. Determination of the amine hydrogen equivalent weight for the system tetraethylenepentamine (TEPA)/epoxy resin DER 331 (187 g eq −1) by DSC: (a) ΔH as a function of hardener concentration (W TEPA, weight fraction) and (b) T g as function of the ratio (r): amine hydrogen equivalent weight/epoxy equivalent weight. Much like pure ammonia, amines easily coordinate with protons thanks to the presence of an unshared electron pair, and as such, they are considered weak bases. With amine-curing agents, it is customary to allow A procedure for the determination of equivalent weight of amines is described. W. 86 Br CH 3 CH 3 Br 1. 2563 The concepts of equivalent weight and gram equivalents help link the (or hydrogen ion, H+) or a single reactive hydroxide ion (−OH−). Users should confirm results by their own tests. Amine Hydrogen Equivalent Weight: AIBN: Azobisdisobutyronitrile (Free Radical Initiator) AMA: Acrylate Maleic Anhydride Terpolymer: AMMA: Acrylonitrile-Methyl Free Amine Level, % 4 2 5 <0. Alternatively, amines with no H’s (triethylamine, pyridine) can be used. Calculations • Alternatively, epoxy number and amine number are defined as follows: The amines are classified as primary, secondary, or tertiary according to one, two or three hydrogen atoms of ammonia molecule are replaced by alkyl or aryl groups in ammonia molecule. 2557 epoxy group, EEW ¼ 400g/eq) and amine‐functionalized cardanol, the phenalkamine NX‐5454 (amine hydrogen equivalent weight (AHEW), grams of  an amine functional curing agent has an Amine Hydrogen Functionality (AHF) of at least 7 and an Amine-Hydrogen Equivalent Weight (AHEW) of at least  { sometimes referred to as equivalent weight per active Hydrogen } – • Amine Hydrogen Equivalent Weight [ AHEW ] • Epoxy Equivalent Weight [ EEW ]  22 มี. Lower amines in the soil are insoluble. Examples: (1) H 2 SO 4 + 2OH-= 2H 2 O + SO 4 2-Molecular weight of sulfuric acid (H 2 SO 4) = 98. 1 7 10 *For secondary amine terminated polymers, AEW value may be used as Amine Hydrogen Equivalent Weight, whereas Hypro 1300X42 ATBN, a primary amine terminated material, Weight per Active Hydrogen is AEW/2. Also is known as WPE (weight per epoxy). Amine value: Amine mol number (mmol) contained in solid 1g; Please refer to the Safety Data Sheet (SDS) that provides details of the safety of the product. 1. ย. Shopping. ≈ 24. 022*10 23 hydrogen ions. Calculations • Alternatively, epoxy number and amine number are defined as follows: Viscosity in CPS at 40°C 8000 - 12000 Typical hydrogen Equivalent Weight 130 Colour, Gardner scale (ISO 4630) 11 Amine value, mg KOH/g 280 - 320 (HCL Method) PRODUCT INFORMATION: CRAYAMID 125 is a medium viscosity liquid amino polyamide resin used in conjunction with epoxy resins to produce high build The amines are classified as primary, secondary, or tertiary according to one, two or three hydrogen atoms of ammonia molecule are replaced by alkyl or aryl groups in ammonia molecule. Amine Hydrogen Equivalent Weight [ AHEW ] = 146 / 6 = 24 g / eq. Equivalent Weight Cycloaliphatic Amines Baxxodur® EC 210 Methyl-diaminocyclo- hexane MCDA 13897-55-7 13897-56-8 31 7 0. If one hydrogen atom of ammonia is replaced by alkyl or aryl group, we get RNH 2 or ArNH 2 , a primary amine. 95/254 Amine Value: 651: Hydrogen Equivalent Weight: 43. Record the specimen weight to 0. 86 ppm Molecular Weight 244. prepreg formulations using various type of amine curing agents. 06. We define the equivalent weight of a substance (element or compound) as: “The number of parts by weight of it, that will combine with or displace directly or indirectly 1. 5 Refractive index, n D 20 1. Normality(N) = Equivalents of Solute / Liters of Solution. Übersetzung im Kontext von „amine hydrogen equivalent weight“ in Englisch-Deutsch von Reverso Context: The process of claim 5 wherein the Component B. Amine-Hydrogen Equivalent Weight; Amine Hydrogen Equivalent WeightBusiness, Epoxy, Calculation. When you denote the concentration of the solution using normality, it means you are expressing the weight of the solute in its gram equivalent per liter of the final solution. AHEW = Amine Hydrogen Equivalent Weight EEW = Epoxide Equivalent Weight . Divide this value by two, since there are two active hydrogen  The Acronym / Slang AHEW means AcronymsAndSlang. Q: A: v3. 331 epoxy resin having an epoxide equivalent weight of 189: Equation 2 Amine hydrogen equivalent weight (AHEW) [g/mol] = 666,67 / Amine value. It is essential to determine the Epoxy Equivalent Weight (E. Calculating Equivalent Weight of Epoxy Mixtures Most formulated products include mixtures of epoxy resins, diluents (reactive and unreactive), fillers, additives,…. The same four reference model blocked prepolymers were blended with amines at a stoichiometric level using the amine’s amine hydrogen equivalent weight (AHEW) with respect to the prepolymer’s equivalent weight. Amines. To calculate the Amine H equivalent resistance, and cure at ambient or mod- weight, use the following equation: Total weight includes all materials, erately elevated temperatures. For a +1 ion, the equivalent weight and the molar mass are identical. calculate the equivalent weight of KMnO4 in neutral medium. The amine equivalent weight will be provided on the COA of the XYLink P-1000. Define amine. As an example, such a calculation would reveal that a more "expensive" amine hardener "A" ($2. Density. Small increases in amine s l levels at the equivalence point will not lead to large increases in pH. dans laquelle x a une valeur de 5,6. : Amine Hydrogen Equivalent Weight, Theoretical 85 Gel time with EPOTUF® 37-140, Minutes at 25 C, 100 Gram Mass 50 * Reflects approximate weight percent in cured film per Method 24 / ASTM D 2369 STORAGE Store in a cool, dry place, preferably under 80 F to ensure a useful shelf life of at least one year. 75, with one cationic amine. Polyetheramine D-400 is characterized by repeating oxypropylene units in the backbone. at 20 °C (68 °F) 10. Abstract Most of the current amines are issued from petrochemical resources and only a few of them are derived from biomass. 008 parts by weight of hydrogen, 8 parts by weight of oxygen, 35. at a ratio of from 0. Different (a) Epoxy composite and (b) Epoxy/PDMS/GO nanocomposite (a) Epoxy/PDMS composites 2 DG-PDMS Sample Code Epoxy (m g Wet methods routinely used are total amine value (ASTM Method D2073) combining weight or neutralization equivalent primary, secondary, and tertiary amine content (ASTM Method D2083) moisture, Kad-Fischer (ASTM Method D2072) and iodine value, measure of unsaturation (ASTM Method D2075). Equivalent Weight - 0. 7. Different (a) Epoxy composite and (b) Epoxy/PDMS/GO nanocomposite (a) Epoxy/PDMS composites 2 DG-PDMS Sample Code Epoxy (m g Amines are regarded as derivatives of ammonia, and are classified into 1º, 2º and 3º amines depending upon the number of hydrogen atoms of ammonia replaced by alkyl or aryl groups. Weigh approximately 1 g of the test specimen in a 50 rnL beaker. Wiki User Answered Related Questions. 9 Flash point,PMCC >204 °C (400 °F) Water content,wt%5 <2 MIXED SYSTEM Mix ratio,parts by weight 100/26. MA-240 difunctional, primary amine with average molecular weight of about 430. 5 equivalents to one equivalent of a c tive hydrogen of a mino groups contained in the aminosilane-modified resin, and under substantially water-free conditions to obtain a room-temperature curable resin havin g an amine valu e of 2 mg KOH or lower. 25 ม. 26 ส. calculated by mean of active hydrogen equivalent weight (AHEW) of hardener and. ค. 17 Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s Why is the amine N atom more Normality is a term used in chemistry to express the concentration of a solution. Amine Value: 651: Hydrogen Equivalent Weight: 43. 9 40-42 2200-3200 122-154 9-13 n n n n Long pot life; Very low viscosity; Low amine hydrogen equivalent weight; Moderate curing speed. This procedure is based on an acid-base reaction performed in glacial acetic acid. 2563 Ammonia reacts with acids to produce ammonium ions. It acts as an epoxy curing agent. R. < 2% below 500 g/mol and hydrogen from ammonia-borane, which has a potential ma terial hydrogen storage capacity of 19. 6 g/eq for TEPA ACROS obtained by potentiometry in a non aqueous medium and related to the first inflection of the primary amine, validates the value obtained by NIR in this work for a similar type of amine. Epoxy Compounds Equivalent weight with epoxies (“Amine hydrogen equivalent weight,” or AHEW) 514 Flash point, PMCC, °C (°F) 185 (365) pH, 5% aqueous solution 10. [Pg. Amine Value Range, mg KOH/g Amine Hydrogen Equivalent Weight (AHEW) (±3) Freeze Point Range, °C Viscosity, cp (±5) Purity as (DAM%) FlexaTram-DAM-120 FlexaTram-DAM-200 FlexaTram-DAM-700 Grades FlexaTram-DAM-120 FlexaTram-DAM-200 FlexaTram-DAM-700 Type Purpose General purpose For drilling, stimulation, production and other applications in oil Amino hydrogen equivalent weight: Solid weight equivalent to one amine mol. ARCHIVED VERSIONS 6. The purpose of  Amine Value, 824. If playback doesn't begin shortly, try restarting your  22 ธ. 40 per pound), having an amine hydrogen equivalent weight  LUCKAMIDE Polyamine, Polyamide is an amine curing agent for room Product Name, Viscosity (mPa. 4 Amine Power 125,716 146. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides (Roger Patrick, DuPont Engineer). The ammonia molecule picks up a hydrogen ion from the acid and attaches it to the lone pair  8 มี. Tertiary amines are amines whose hydrogens have been completely replaced by organic substituents. CAS No. ) is  Amine hydrogen equivalent weight (as supplied). Color (Platinum Cobalt). 02 (weight of the two carbons and five hydrogens) + 221. 16893 N = 0. Equivalent weight definition is - the mass of a substance especially in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram of hydrogen : the atomic or molecular weight divided by the valence. Please also find AHEW meaning in other sources  4 มี. Epoxy Acrylate Oligomers: Cure Energy vs. 18 Physical Properties of Amines: Boiling Points Name Molecular weight Boiling point Acetic acid 60. 4-8. As shown by the representative structure, Polyetheramine D-400 is a difunctional, primary amine with an average molecular weight of about 430. 6 gr/eq 2 To calculate the stoichiometric ratio of D. The data  D. Primary amines are formed when one hydrogen is a place, secondary amines are formed when two hydrogens are placed, and tertiary amines are formed when all three hydrogens are replaced. • 3° amines, since they do not hydrogen bond to each other, have boiling points similar to hydrocarbons of the same molecular weight. By contrast, the reversible conversion of CH 3 OH and an amine to a formamide and H 2 — termed ‘amine reforming’ — is a mild and practical means of H 2 storage according to the group of Important for the reaction with epoxy resins are only the nitrogen bond hydrogenatom of the primary and secondary amines. C2H5OH + NH3 → C2H5NH2 + H2O. Epoxy Compounds Finally, when considering the costs of the hardener, one must consider both the cost by weight and the amine hydrogen equivalent weight. check-circle. In an exemplary embodiment, the Amine-Hydrogen Equivalent Weight (AHEW) may be at least about 50, such as at least about 70, at least about 115, or even at least about 120. The molecular weight of the trimesium salt formulation is 245. 5 to 2 liters/min (1 to 4 ft3/hr). 1: Recycled Content: 94%: Synthesis of 3-ethyl-2-propyl-1,5-pentanediamine (PEPDA) Summary Low amine hydrogen equivalent weight (AHEW) Improved balance of cost & performance Superior freeze/thaw stability (Passes 3+ Cycles; -5 °C to 23 °C) Formulation and Performance EPIKURE Curing Agent 8530-W-75 can be diluted up to 50% by weight with water to form a clear to hazy solution. Active Hydrogen Equivalent Weight _ _ _ _ _ _ _ _ _ _ _ _ _ _ 34. portfolio of amines suitable for epoxy and polyurea applications. Contents. Various nomenclatures are used to  GRAM EQUIVALENT WEIGHT. Phenyl hydroxyl amine Secondary amines are those that have two substituents and one hydrogen bonded to a nitrogen. H. 2553 Amine Hydrogen Equivalent Weight [ AHEW ]unit: grams / equivalent. Active  Compositions of amine terminated polyamide resins useful for curing epoxy resins The Amine hydrogen equivalent weight (AHEW) was calculated using the  Amine hydrogen equivalent weight was determined using 100 mg of amine hardener dissolved in 50 ml of water and titrated with 0. Normality is denoted by ‘N’. 03 g/equivalent of H + Reasoning: • Amine must have at least one hydrogen to begin. 8 shows the theoretical relationship between molecular weight and NCO/OH ratio. Amine value 255 - 275 mg KOH/g ISO 9702 Amine Hydrogen Equivalent Weight (as supplied) 175 g/eq Calculated Solids content 69 - 71 wt. The primary amine 3 groups are located on secondary carbon AHEW (Amine hydrogen equivalent wt. Share. long-term retention of properties is pos- Equation (1): sible at temperatures up to 100°C. . 6 g of AFD is needed to cure the 100 g of BADGE resin. 0 g/mol 118°C meter should have a petcock, or equivalent, on the outlet connector which can be closed during the leak-check. Add 10 ml- of methylene chloride and 10 ml- of tetraethylammonium bromide indicator solution. It offers low color, vapor pressure, excellent mechanical properties and relatively high glass transition temperature. 1 ref. of active hydrogens Example Amine H eq wt D. How to abbreviate "Amine Hydrogen Equivalent Weight"? "Amine Hydrogen Equivalent Weight" can be abbreviated as AHEW. To this different amines such as Tetraethylenepentamine (TEPA), Bishexamethylenetriamine (BHMT), 2-methyl pentamethylenediamine (2-MPMDA) and 2,2,4-trimethy diamines(2,2,4-TMDA) based on their hydrogen equivalent weights are added and mixed thoroughly for a minute using thin wooden stick. 32 ounces = 1 quart, 128 ounces = 1 gallon, 3. Amine Duty 5,680,514 Sub-total 16,309,040 Amine Coolers 3,550,321 Product Cooler 800,533 BFW Pump 10,959 12. The equivalent weight obtained by NIR spectroscopy (62. at 20 °C (68 °F) 8. Watch later. 1152] Normality is the number of equivalent weights (EW) per unit volume and, like formality, is independent of speciation. Amines are basically ammonia with one or more hydrogen atoms replaced by organic groups and include: Aromatic Amines. Lower aliphatic amines can form water molecular hydrogen bonds, making them water-soluble. 1 Boiling Point, °C mmHg 150 (3 mmHg) Melting Point, °C -10 Vapor Pressure, mmHg @ 25°C 0. < 10% below 500 g/mol and < 25% below 1,000 g/mol. Equivalent weight of amine 100 Number of active hydrogen of the amine . Because all three classes of amines can engage in hydrogen bonding with water, amines of low molar mass are quite soluble in water. Click the link for more information. 2563 Amine hydrogen equivalent weight. 875. Table S1. ), g/eq 60 . • 1° and 2° amines have lower boiling points than alcohols of similar molecular weight. The equivalent amount of HCl is washed from the column (in 10 column volumes) into a volumetric flask and made up to volume. 300. Amine Hydrogen Equivalent Weight----- X 100 = PHR Epoxy Equivalent Weight – It must be homogenous – How to find WPE & Eq. They are called amine. 7 Total 10,570,777 Gas Compressor 385,571 448. The stoichiometric mix ratio or the parts by weight of curing agent per 100 parts of epoxy resin (phr) is given by. Aliphatic Amines. Figure 3. • For more precise neutralizationequivalent weight of 76 for the , use an Carbopol ® polymer. Hence, there are increasing expectations for bio-based amines, particularly for aromatic Amino hydrogen equivalent weight: Solid weight equivalent to one amine mol. (grams of hardener containing 1 active hydrogen) EEW (g/Eq): Epoxy Equivalent Weight. Different (a) Epoxy composite and (b) Epoxy/PDMS/GO nanocomposite (a) Epoxy/PDMS composites 2 DG-PDMS Sample Code Epoxy (m g Cyclic amines can be encapsulated in a water-soluble self-assembled supramolecular host upon protonation. weight diols (ethylene glycol, 1,4-butanediol, 1,6-hexanediol), cyclohexane dimethanol, diamines, hydroxyl-amines (diethanolamine and triethanolamine) are used as chain extenders in PU synthesis while those with functionality 3 or > 3 are used as crosslinkers. The solubility of PEA/DICY and L-DICY in  Moreover, providing aromaticity tunes the hydrogen equivalent weight (HEW), decreases the volatility of amines and induces high thermo-mechanical properties  Polyether Amine. Thus, DGEBA, which has a molecular weight of 340 grams and two epoxy groups, would have an epoxy equivalent weight of 170 grams. Amine hydrogen equivalent weight = Molecular weight of Amine number of active hydrogens = 170. 5 parts by weight chlorine or the equivalent parts by weight of another element”. Examples include monofunctional organic alcohols, amines and mercaptans. Jeffamine® D-205 Amine by Huntsman is difunctional primary amine with oxyalkylene units. 2564 Calculate the equivalent weight of following assuming molecular weight Hydroxyl amine reduces iron (III) according to following equation  this chapter amines and amides. 87 ppm 1. 3 Calculate the amine value of polyamide resins: Amine Value= mL of HBr Normality of HBr 56. Amine curing agentsW(mass fraction of amine curing agent required for 100 mass hydrogen atoms in amine molecule*epoxy equivalent=(molecular weight of  Amine value _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 824. Text Solution. 07 g/mol . Hydrogen Equivalent weight, g/Eq Mixing ratio phra Gel Timea (100g@23 °C) minutes Uses and comments ACCELERATORS D-CURE 054 100 – 300 - 5-15-2,4,6-tris(dimethylaminomethyl)phenol. 25 per pound) having an AHEW of 60, since more of the amine B must be used due to its higher AHEW. g eq−1kg eq−1. Various nomenclatures are used to derive names for amines, but all involve the class-identifying suffix –ine as illustrated here for a few simple examples: To calculate the Amine H equivalent resistance, and cure at ambient or mod- weight, use the following equation: Total weight includes all materials, erately elevated temperatures. The literature value of 62. Accelerator for epoxy resin/amine systems. Primary amines, RNH2 secondary amines, R 2NH; and tertiary amines, R 3 N, where R is CH 3, C 2 H 5, C 6 H 11, C 6 H 5, and so on, are distinguished according to the number of substituted Equivalent weight of amine 100 Number of active hydrogen of the amine . 94 -92 210 190 110 36-51 1. Phr = AHEW / EEW x 100 . For fiber-reinforced polymers (FRP) composite resins, low free monomer phenolic resins, epoxy hardeners, etherified resins, waterborne dispersions and solid and solution phenolic resins 5. (grams of epoxy resin containing 1 epoxy group). 6 and wherein the ave rage amine hydrogen equivalent weight is 1 00; (iii) v3. 6lbs/gal. 330-370 for the XYLink P-1000 and EEW is the epoxy equivalent weight of the epoxy resin. 3rd ed. The molecular weight of the 8-carbon ester formulation is 333. The procedure to use the equivalent weight calculator is as follows: Step 1: Enter the molecular weight, valency value, and x for the unknown in the input field. Typical Handling and Performance Properties with an average molecular weight of about 20. Shelf Life (Months). Epoxy Equivalent Weight * GP-712 ** 192. ™ 20 hardener to use with D. 1000 cP. Amine Hydrogen Equivalent Weight listed as AHEW. Gas volume for one revolution of the meter must not be more than 10 liters. This is dependent on the number average molecular weight (NAMW) of the polymer. 4 Equivalent Weight 122. For example, sulfuric acid, H 2 SO 4 , with two H + ions has an n (number of equivalents) of 2, while hydrochloric acid, HCl, with one H + ion has an equivalent weight of 1. The mix ratio by weight is 150 g epoxy per 30 g amine. Amine quality has a strong impact on the good operation of the amine unit. value of 5. Compositions employed in this amine blends revealed that the spectroscopic vari- molecular weight of the parent glyphosate acid is 169. The amine hydrogen equivalent weight of DETA is calculated as below: Molecular weight/# of NH = 103/5 = 20. 2 Calculate the epoxy equivalent of epoxy resins: Epoxy Equivalent Weight of Sample NVM (fraction) Normality of Hbr mL of Hbr =• × × 1000 % 5. Amine Value. 87 3. , Volumes 1-26. 169 Calculate the epoxy equivalent weight (Ew) for resins and solutions using the following formula: 2. The primary amine groups are located on secondary carbon atoms at the end of the aliphatic polyether chains. Increasing the size of the hydrophobic alkyl portion decreases the amine molar weight, resulting in a decrease in water solubility. The acid equivalent of the isopropylamine salt formulation is: The alkyl derivatives of ammonia are called amine. The epoxy equivalent weight (EEW) of the epoxy resin used allows the correct stoichometric calculation of the amounts to be used. However, as the viscosity of the curing agent is reduced in these products, it is generally found the amine hydrogen equivalent weight (AHEW) also decreases. 87 ppm 3. It is designed to be a low amine hydrogen equivalent weight polyetherdiamine with slow curing speed. 75 g/mol, where the molecular weight of the repeating unit is 232. 575 (1) The amount of amine added in parts per hundred (phr) was thus found by phr = AHEW EEW 100 = 42. ) of the mixture to determine proper stoichiometric ratios with the curing agent. EI (Eq/Kg): Epoxy Index. In this method also a mixture of primary secondary and tertiary amines is obtained, but when used ammonia intensively, the main product is either primary amine or ethyl amine. The equivalent weight of an element or radical is equal to the ratio of it's atomic weight or formula weight devided by it's valency. Epoxy-equivalent weight (g/Eq) 550-760 400-500 280-350 The equivalent weight of BADGE resin is 176 g/mole (mentioned by manufacture) and an active hydrogen in 2-AFD is FOUR. Pressure - force per unit area; measured by barometer (1 torr = 1 mm Hg), manometer U-shaped tube Amine quality has a strong impact on the good operation of the amine unit. However, weight of aliphatic amine was added and mixed our previous studies on PC–epoxy/aliphatic using a stirrer. Stoichiometric ratio 1:1 should be the starting point. Amines, Molecular Weight (DETA) 3 Max. espacenet. ™ 331 epoxy resin having an epoxide equivalent weight of 189: Equation 2 phr1 of amine = Amine H eq wt x 100. What is epoxy hardener  9 มี. Definition: Grams of hardener containing one equivalent of N-H groups. (1) Typical properties, not to be construed as specifications. Among the three amines tested as chain extenders (isophoronediame, polyetheramine, and CNSL-phenalkamine), the amine characterized 1. For a +2 or +3 ion, the equivalent weights are one half and one third of the molar masses, respectively. 95/254 Amine Hydrogen Equivalent Weight (AHEW or HEW) Calculation Each experimental HEW was determined by NMR 1 H titration using benzophenone as the intern reference. 5 gram-atom of oxygen, or 1 gram-ion of the hydroxyl ion. 7 g/eq) allowed to calculate the molar mass of TEPA of Identify Carboxylic acids , amines and amino acids. Step 2: Now click the button “Calculate x” to get the result. Fluids - liquids and gases; flow freely. Same concept of EEW but expressed in another units The literature value of 62. 1 Archived versions are available. 0001 g as A. 9 to 1. 10 9 8 7 6 5 4 3 2 1 0 1. Epoxy-equivalent weights are important in calculating the stoichiometric (theoretical) amounts of hardeners or curing agents needed to achieve optimum polymerization. (number of epoxy groups in one Kg of resin). AHEW is defined as Amine Hydrogen Equivalent Weight somewhat frequently. The weight of a compound that contains ONE EQUIVALENT of a proton (for acid) or ONE EQUIVALENT of an hydroxide (for base). Gardner color: 8 max. 12 ม. s, 25°C), Active Hydrogen Equivalent Weight (g/eq. Pressure - force per unit area; measured by barometer (1 torr = 1 mm Hg), manometer U-shaped tube Molecular Weight 244. hydrogen from ammonia-borane, which has a potential ma terial hydrogen storage capacity of 19. DICY was increased with inferior reactivity to PEA/DICY. 6 weight %. AMINES AND MODIFIED AMINES D-CURE 120 5 – 20 43 23 - For solventfree ambient and heat cure The percent yield of each amine is determined by the ratio of dichloroethene to ammonia. **Measured via DSC (Differential Scanning Calorimeter). Where AHEW is the amine hydrogen equivalent weight of the curative, i. Amine Value Range, mg KOH/g Amine Hydrogen Equivalent Weight (AHEW) (±3) Freeze Point Range, °C Viscosity, cp (±5) Purity as (DAM%) FlexaTram-DAM-120 FlexaTram-DAM-200 FlexaTram-DAM-700 Grades FlexaTram-DAM-120 FlexaTram-DAM-200 FlexaTram-DAM-700 Type Purpose General purpose For drilling, stimulation, production and other applications in oil • Tertiary amines cannot form hydrogen bonds to each other but can form hydrogen bonds to hydrogen bond donors such as water • Tertiary amines have lower boiling points than primary or secondary amines of comparable molecular weights • Low molecular weight amines tend to be water soluble whether they are primary, secondary or tertiary value of 5. Looking for abbreviations of AHEW? It is Amine Hydrogen Equivalent Weight. 4514 Vapor pressure, mm Hg/°C 0. New York, NY: John Wiley and Sons, 1978-1984. the second pack comprises an amine curing agent for the epoxy resin, curing agent the active hydrogen equivalent weight of the amine curing agent is. 1 Weight of Polyamide NVM (fraction) ×× ×% 6. )  Amine Hydrogen Equivalent Weight (g/eq). The epoxy-alkyl functionality reacts with systems containing alcohol, acid and amine functional monomers. 2563 One equivalent amine weighs 30 g. 96 Min. % ATSM D2369 Notes These are typical properties only and not to be construed as specifications. • Some base is required for the deprotonation step and to absorb the HCl. (nonredox reaction) the mass in grams of a substance equivalent to 1 gram-atom of hydrogen, 0. Therefore, in-creasing molecular weight brings the resin to a consisten-cy that requires solvent to allow for • 1° and 2° amines have lower boiling points than alcohols of similar molecular weight. • But 3º amines can’t work. 2046 pounds = 1 kilogram. The equivalent weight of BADGE resin is 176 g/mole (mentioned by manufacture) and an active hydrogen in 2-AFD is FOUR. Epoxy-equivalent weight (g/Eq) 550-760 400-500 280-350 presence of hydrogen bonding, resulting in a mo-was cooled to room temperature, equal equivalent lecular level mixing of the blend system. – PHR by weight Momentive Confidential Global Leadership Across Technologies & Markets Oilfield Proppant Forest Product Resins Resins Phenolic Specialty Resins Amine Hydrogen Equivalent Weight (AHEW) was 1:1. Amine Hydrogen Equivalent Weight; Amine oxidase Amino hydrogen equivalent weight: Solid weight equivalent to one amine mol. The units are thus mg KOH/g. There is no need to use could contain a compound with active hydrogen and a catalyst. • Discovered several active heterogeneous catalysts for hydrogen release from ammonia-borane. Dytek ® DCH-99 also has a lower Hydrogen Equivalent Weight (HEW) giving more curing capability on a weight basis and better overall cost effectiveness. Amines, Molecular Weight (DETA). Step 3: Finally, the equivalent weight value will be displayed in the output field. Rotameter, or equivalent, to measure flow rates in the range from 0. Amine Hydrogen Equivalent Weight (g/eq) § 24 Diethylenetriamine = TETA (wt%) 96 Min. This equivalent weight applies to both the acrylate and secondary hydroxyl group functionality. 20 = 103. Gram equivalent weight— A. For CAS RN 26590-05-6, the amine equivalent is 232. 6 and. < 2% below 500 g/mol and The charge density is calculated by dividing 1000 g by the amine equivalent weight. Amines are molecules that contain carbon-nitrogen bonds. 6 Flash point,TCC 135 °C (275 °F) EPIKURE 537 Curing Agent Viscosity @ 25 °C,(P)2 6-70 Weight per gallon, lb. [] et da ns laquelle le poids moyen équivalent de l'hydrogène d'amine est 100 ; (iii) v3. 13 เม. Background 4,4'-Diamino-3,3'- dichlorodiphenylmethane (MOCA) is a diamine compound that is most commonly used as a curing agent in the production of urethane polymers. 04 (weight of the parent acid) = 250. Amines are formally derivatives of ammonia, wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines Amine value 255 - 275 mg KOH/g ISO 9702 Amine Hydrogen Equivalent Weight (as supplied) 175 g/eq Calculated Solids content 69 - 71 wt. 1 List of ASTM  The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen. Amine content= 1000 / 24 = 42 eq / kg. amine (əmēn`, ăm`ēn): see under amino group amino group, in chemistry, functional group that consists of a nitrogen atom attached by single bonds to hydrogen atoms, alkyl groups, aryl groups, or a combination of these three. It can be determined by dividing the molecular weight by the number of hydrogen atoms or hydroxyl ions (or their equivalent) supplied or required by the molecule in Equivalent weight of an acid - mass needed to furnish 6. “Free” amine, amine not bound by HSS, is the active ingredient for acid gas pick up. Amount of dilution and resultant Amine hydrogen equivalent weight (AHEW) [g/mol] = 666,67 / Amine value. 1 Table 1: Typical Epoxy Properties cosity and functionality of the resin are. E. • Add strong inorganic bases as a 10-20% aqueous solution. An organic compound that contains an amino group is called an amine. amine synonyms, amine pronunciation, amine translation, English dictionary definition of amine. The hydrogen-bonding ability of the cyclic amines, as well as the reduced degrees of rotational freedom, allows for the formation of proton-bound homodimers inside of the assembly that are otherwise not observ-able in aqueous solution. Equivalent weight is the formula weight. It can be determined by dividing the molecular weight by the number of hydrogen atoms or hydroxyl ions (or their equivalent) supplied or required by the molecule in The equivalent weight of BADGE resin is 176 g/mole (mentioned by manufacture) and an active hydrogen in 2-AFD is FOUR. The AHEW meaning is Amine Hydrogen Equivalent Weight. Graph 2. Kirk-Othmer Encyclopedia of Chemical Technology. The former case applies to acids, which are proton donors, while the second applies to bases, which are proton acceptors. , p. 2561 The amine equivalent weight will be provided on the COA of the XYLink P-1000. 3 Max. Organic solvents such as ethanol, benzene, and ether dissolve amines readily. 575 170. The weight % of MDEA in the solution is 0. An equivalent weight is defined as the ratio of a The amount of hydrogen ions transferred in acid-base reactions will give the equivalent weight of that acid. Amine Hydrogen Equivalent Weight calculated. A resonance that integrates for six protons indicates two equivalent CH 3 groups, which is generally indicative of an isopropyl group. It is expressed the weight of KOH in milligrams that will neutralise the NH in 1 gram of hardener. Except for polyesters manufactured solely from prescribed reactants, a PLC must meet the percentage of low molecular weight species requirements. In other words, the compounds that are obtained when the hydrogen atoms in the ammonia molecule are replaced by an equal number of alkyl groups. 6 Reformer Fuel Gas 8,184,406 38. Amines are carbon-hydrogen-nitrogen Amines and amides occur widely in living organisms. Above-mentioned regulations are valid September, 2012. Good both reactive and nonreactive. The equivalent weight can be thought of as the weight (or mass, to be precise) of a substance that will contain a single reactive proton (or hydrogen ion, H +) or a single reactive hydroxide ion (−OH −). 5. The molecular weight of the isopropylamine salt is 59 (weight of the three carbons, ten hydrogens, and one nitrogen atom) + 169 (weight of the parent acid) = 228. Info. 2562 The hydrogen equivalent is the calculation of the molecular weight of the polymanine divided by the amount of the active hydrogen atom. 2549 such a calculation would reveal that a more "expensive" amine hardener "A" ($2. This unique amine hydrogen equivalent weight provides formulators with more options to develop new thermoset formulations based on epoxy resins and amine hardeners.

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