Fast switchable, epoxy based shape-memory polymers with high strength and toughness
Fast switchable, epoxy based shape-memory polymers with high strength and toughness
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DOI：
10.1016/j.polymer.2015.12.007
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发表时间：
2016-01-28
期刊：
影响因子：
4.6
通讯作者：
Hartwig, Andreas
中科院分区：
文献类型：
--
作者：
Arnebold, Andre;Hartwig, Andreas
提出了一种可快速切换的环氧基形状记忆聚合物。为此，在高熔融聚酯多元醇即聚（omega-pentadecalactone） （PPDL）的存在下，通过阳离子聚合形成部分结晶性环氧树脂。在一定的聚合条件下，与相应的聚（epsilon-己内酯）（PCL）对应物相比，该体系产生了高度的结晶度。因此，这种环氧树脂/PPDL复合材料具有非常快的形状固定性和良好的形状记忆循环稳定性。此外，与各自的环氧树脂/PCL复合材料相比，通过偏析和结晶形成的非均匀形态导致强度和韧性增强。(C) 2015 Elsevier Ltd.版权所有。
A fast switchable, epoxy based shape-memory polymer is presented. For this, a partially crystalline epoxy resin was formed by cationic polymerization in the presence of a high meltable polyester polyol, namely poly(omega-pentadecalactone) (PPDL). Under certain polymerization conditions, this system generates a high degree of crystallinity compared to the respective poly(epsilon-caprolactone) (PCL) counterpart. Thus, such an epoxy/PPDL composite exhibits very fast shape-fixity and a good shape-memory cycle stability. Furthermore, the formation of a heterogeneous morphology by segregation and crystallization leads to enhanced strength and toughness compared to the respective epoxy/PCL composites. (C) 2015 Elsevier Ltd. All rights reserved.