Effects of the Chemical Structure Changes on Phase Behavior, Thermal and Mechanical Properties of Rigid Rod Epoxy Resins

Abstract

Abstract: Phenol novolac resins(PN) and sulphanilamide(SAA) were used to cure rigid rod epoxy resins, namely DGEBP, DGETMBP and traditional epoxy resin(DGEBA). The effects of chemical structure of epoxy resins on the thermal, mechanical, and phase behavior were studied. The results show that rigid rod epoxy resins exhibited better physical properties than DGEBA. The epoxy networks which contain oriented domains showed high thermal properties and toughness. SEM was conducted to investigate the morphology of fracture surface. The fractography of unisotropic rigid rod epoxy networks exhibited an extremely rough and highly deformed fracture surface. The fracture surfaces of the isotropic epoxy networks were smooth, which was the character of fragile materials.

Key words: Epoxy resin, Rigid rod, Liquid crystalline orientation, Fracture toughness

CLC Number:

O633.22

TrendMD:

REN Shao-Ping^1,2,3, LIANG Li-Yan^1,2,3, LAN Yan-Xun², ZHOU Jiang-Min⁴, Ldoi: .

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Effects of the Chemical Structure Changes on Phase Behavior, Thermal and Mechanical Properties of Rigid Rod Epoxy Resins

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