Study on Novel Polyamides Based on Ester Terminated Epoxy Resin

Abstract

The bisester 1, 1′-(1-methylethylidene)bis[4-{1-imino-4-ethylbenzoate-2-propanolyloxy}]benzene (DGEBA-4-AEB), synthesized by the reaction of the epoxy resin diglycidyl ether of bisphenol-A (DGEBA) with 4-amino ethyl benzoate (4-AEB), was condensed with different aromatic diamines, namely 4, 4′-diamino diphenyl methane (DDM), 4, 4′-diamino diphenyl sulfone (DDS) and benzidine (Ben) to yield novel epoxy based curing agents. The resultant novel epoxy based polyamides (PAs) were characterized by infrared spectroscopy along with the estimation of number average molecular weight (M_n ) by gel permeation chromatography (GPC). Using differential scanning calorimetry (DSC), the kinetics of the curing reactions of PAs–epoxy resin systems were established by evaluating the usual kinetic parameters. The thermal behaviour of PAs–epoxy cured products was also studied by thermogravimetric analysis (TGA).

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