Abstract
Reaction path of two kinds of epoxy resins were studied by MALDI-TOFMS. In the case of ring-opening reaction of novolac epoxy resin with acetic acid, epoxy ring was opened to be mono-acetylated diol by acetic acid, consequently hydroxy group formed by ring-opening reaction was acetylated. In the case of ring-opening polymerization of bisphenol A epoxy resin with N,N′-dimethylethylenediamine, various kinds of polymers were formed and molecular weights of the polymers were increased corresponding to reaction time. In both cases, structures of epoxy resins and reaction products were determined by FABMS/MS or LSIMS/MS.
