摘要
将顺丁烯二酸酐(MA)与不同比例的氢化环氧树脂、聚丙二醇二缩水甘油醚(PPGDGE)共混,经完全固化制备出一种新型的形状记忆氢化环氧树脂体系。利用DMA,DSC、弯曲测试和U型形状记忆测试系统研究了该固化体系的动态力学性能、力学性能和形状记忆性能,结果表明:该固化体系交联点之间存在较长的柔性链段,导致部分结晶现象的出现;固化体系的玻璃化转变温度(Tg)最高达124℃,并且Tg随PPGDGE含量的增加而线性降低;该形状记忆氢化环氧固化体系具有优良的形状记忆性能,经过5次形状记忆测试,变形的试样均能在数分钟内完全恢复到变形前的状态,形变恢复率达100%。
A novel shape memory hydro-epoxy resin system was prepared by hydro-epoxy, poly （propylene glycol） diglycidyl ether （PPGDGE） and maleic anhydride （MA）. DSC, DMA, bend test and U type shape memory test were used to systematically investigate the thermo-mechanical, mechanical and shape memory properties of these materials. These results indicate that the segment crystallization might occur, due to the existence of long flexible segments between the crosslink points in the hydro-epoxy network. The glass transition temperature （Ts） of polymer decreases linearly with increasing of PPGDGE content, the highest Tg can reach to 124℃. The novel shape memory hydro-epoxy resin has good shape memory performance. The recovery time doesn＇t change dramatically in five cycles, full recovery can be observed only in several minutes, the shape recovery ratio （Rr） is almost 100%.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2012年第3期57-62,共6页
Journal of Aeronautical Materials
基金
西北工业大学基础研究基金(NPU-FFR-201047)
西北工业大学博士论文创新基金资助项目
关键词
氢化环氧
形状记忆
玻璃化转变温度
结晶
hydro-epoxy
shape memory polymer
glass transition temperature
crystallization
