Investigation of Glass transition temperature (Tg) of Bisphenol A based epoxy resin and cyclo-aliphatie amine system with variation of stoichiometry

摘要

There is a temperature boundary for almost all amorphous polymer, above which the substance remains soft, flexible and rubbery and below which it becomes hard, brittle and glassy, this temperature is called glass transition temperature (Tg). Many studies have been done to understand the behaviour of glass transition temperature of epoxy amine systems with respect to variation of cure stoichiometry. With increase in level of crosslink density of the epoxy with amine increases the glass transition temperature in general. Tg is an important criteria for deciding the end application of the coating including high temperature exposure.