STUDIES ON DIOL MODIFIED EPOXY-RESINS BY ANALYTICAL PYROLYSIS

Epoxy resins synthesized from diglycidyl either of bisphenol A (DGEBA) and alkanediol cured with magnesium perchlorate or dimethylbenzylamine accelerator have been studied by direct inlet mass spectrometry (d.i.m.s.) and pyrolysis-gas chromatography-mass spectrometry (py-g.c.-m.s.). Both the evaporation of residual diol and oligomeric hydroxyethers of DGEBA and the thermal cleavage of terminal and side groups involving diolethers have been monitored by d.i.m.s. Phenols, bisphenol A and two benzofuranoic pyrolysis products identified by py-g.c.-m.s. have been found to reveal the network structure of the epoxy resins.