Inorganic chemistry, amine value is a measure of the nitrogen content of an organic molecule.[1] Specifically, it is usually used to measure the amine content of amine functional compounds.[2] It may be defined as the number of milligramsofpotassium hydroxide (KOH) equivalent to one gram of epoxy hardener resin. The units are thus mg KOH/g.
There are a number of ASTM analytical test methods to determine amine value. A number of states in the United States have adopted their own test methods but they are based on ASTM methods.[3] Although there are similarities with the method it is not the same as an acid value.
The amine value is useful in helping determine the correct stoichiometry of a two component amine cure epoxy resin system.[6][7][8]
It is the number of Nitrogens x 56.1 (Mwt of KOH) x 1000 (convert to milligrams) divided by molecular mass of the amine functional compound. So using Tetraethylenepentamine (TEPA) as an example: Mwt = 189, number of nitrogen atoms = 5
So 5 x 1000 x 56.1/189 = 1484. So the Amine Value of TEPA = 1484
All numbers are in units of mg KOH/g.
{{cite book}}: CS1 maint: others (link){{cite book}}: CS1 maint: location missing publisher (link)