In this work, we fabricated a triple‐shape memory polymeric composite (TSMPc) by electron beam irradiation of ε‐polycaprolactone (ε‐PCL)/poly(butylene adipate‐co‐terephthalate) (PBAT)/bentonite(50/50/4) (wt %). The 95 ± 5 kGy was confirmed to be the saturated irradiation dose by both high‐temperature storage modulus and the equilibrated relaxation modulus at nonlinear elastic region. Further results demonstrated that sample exposed to 41.4 kGy exhibited excellent triple‐shape memory effect (TSME) though there existed slight plastic flow in PBAT. The two fixity ratios and total recovery ratio can be as high as 99.9, 98.3, and 94.7%. Besides, the strength of irradiated PBAT was improved because of the synergistic mechanical coupling effect from PCL and bentonite. In the meantime, this synergistic effect also improved the integral TSME and the stability of all shapes. Eventually, we made a comparison among the controllable factors, the crosslinking density and amount of deformation Δε_B → C were believed to have more influences on the stability of temporary shapes and the recovery behavior during the shape memory cycle “A → B → C → B_r → A_r.” © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48577.

中文翻译：

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聚己内酯/聚己二酸丁二醇酯-对苯二甲酸对苯二甲酸酯/膨润土的选择性交联制备的可调谐三重形状记忆复合材料

在这项工作中，我们通过电子束照射ε-聚己内酯（ε-PCL）/聚己二酸丁二酯共聚物制备了三重形状记忆聚合物复合材料（TSMPc）对苯二甲酸酯（PBAT）/膨润土（50/50/4）（重量％）。高温储能模量和非线性弹性区的平衡弛豫模量均将95±5 kGy确认为饱和辐照剂量。进一步的结果表明，暴露于41.4 kGy的样品虽然在PBAT中存在少量塑性流动，但仍表现出出色的三重形状记忆效应（TSME）。两种固定率和总回收率可高达99.9、98.3和94.7％。此外，由于PCL和膨润土的协同机械耦合作用，提高了辐照PBAT的强度。同时，这种协同作用还改善了整体TSME和所有形状的稳定性。最后，我们对可控因素，交联密度和变形量进行了比较。Δε_{乙 →  Ç}被认为对临时形状的形状记忆循环期间的稳定性和恢复行为更影响“甲 → 乙 →  Ç  → 乙_{- [R}  → 甲_{- [R} ”。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2020， 137，48577。