聚氨酯改性环氧树脂形状记忆材料

Modified Shape Memory Epoxy by Blending Polyurethane

以甲基四氢邻苯二甲酸酐(METHPA)为固化剂,利用自制的聚氨酯预聚体(PU)改性环氧树脂(TDE-85)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、Tg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,形状回复率皆在96%以上,形状固定率约达100%。

Shape memory epoxy resin of PU/TDE-85 was prepared by using tetrahydromethyl-1,3-isobenzo- furandione（METHPA） as a curing agent. The characteristics of the blends were investigated by tensile test, SEM, DMA and FTIR. Blends with varying proportions of PU/TDE-85 were studied for their mechanical properties, ther- modynamics, glass-transition temperature and shape memory properties. The test results show that the toughness of ep- oxy resin was improved by adding PU. 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 a- chieve 96% and 100%, respectively.