环氧树脂
热固性聚合物
缩水甘油醚
材料科学
复合材料
形状记忆聚合物
酯交换
自愈
断裂(地质)
形状记忆合金
双酚A
有机化学
催化作用
化学
替代医学
病理
医学
作者
Lu Lu,Jizhou Fan,Guoqiang Li
出处
期刊:Polymer
[Elsevier]
日期:2016-11-01
卷期号:105: 10-18
被引量:93
标识
DOI:10.1016/j.polymer.2016.10.013
摘要
A shape memory and healable epoxy was prepared based on esterification between diglycidyl ether of bisphenol A and tricarballylic acid. The healing was achieved through transesterification at the fracture surface between two epoxy blocks in a confined space assisted by shape recovery force. The shape recovery of the compression programmed epoxy at elevated temperature tightly closed the gap between the two epoxy blocks, whose fracture surfaces are saw-cut and not perfectly matched during healing, which is the worst case scenario for the healing test. A healing efficiency of ∼60% was achieved. This suggests that, for naturally cracked surfaces, which have smoother fracture surfaces and better surface alignments during healing, higher healing efficiencies could be expected. We believe that the combination of shape memory and intrinsic healing capability within one network will broaden the applications of thermosets and enable recycling.
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