端羧基丁腈橡胶改性环氧形状记忆聚合物

以甲基四氢邻苯二甲酸酐(METHPA)为固化剂,利用端羧基丁腈橡胶(CTBN)改性环氧树脂(EP)制备形状记忆聚合物。研究了形状记忆环氧树脂的力学性能、玻璃化转变温度和形状记忆性能。研究表明,形状记忆环氧树脂的韧性得到明显的提高,Tg得到了相应的下降,形状记忆性能良好,形状固定率皆在97%以上,形状回复率约达100%。

Modified Shape Memory Epoxy by Blending CTBN Liquid Rubber

Toughening of a diglycidyl ether of bisphenol-A(E-51)-based epoxy resin and TDE-85 with liquid

carboxyl-terminated butadiene acrylonitrile(CTBN) copolymer has been investigated in this research. Shape memory

epoxy resin of CTBN/ EP was prepared by using tetrahydromethyl-1,3-isobenzofurandione(METHPA) as a curing agent.

The characteristics of the blends were investigated by tensile test, SEM, DMA and FTIR. Blends with varying

proportions of CTBN/ EP were studied for their mechanical properties, thermodynamics ,glass-transition temperature

and shape memory properties. The test results show that the toughness of epoxy resin was improved by adding CTBN.

And the glass-transition temperature also decreased accordingly. Moreover, the material exhibited a good shape memory

performance, the shape recovery and the shape fixity of this material can achieve 100% and 97%, respectively.