Ionically Cross-Linked Shape Memory Polypropylene
Ionically Cross-Linked Shape Memory Polypropylene
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DOI：
10.1021/acs.macromol.6b01387
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发表时间：
2016-09-27
期刊：
影响因子：
5.5
通讯作者：
Tiller, Joerg C.
中科院分区：
文献类型：
--
作者：
Raidt, Thomas;Hoeher, Robin;Tiller, Joerg C.
通过将马来酸酐（MA）接枝到聚合物上，然后与ZnO复合，合成了离子交联间同立构聚丙烯（ix-sPP）。通过X射线散射、透射电子显微镜和各种热分析和力学分析研究了聚合物网络。具有1重量% MA接枝和20重量% ZnO的优化的聚合物网络表现出125 ° C的晶体熔融温度和高达203 ° C的橡胶弹性行为，并且在较高温度下变成粘性聚合物熔体。这个过程是完全可逆的。此外，ix-sPP是非常稳定的离子聚合物网络，其在形状记忆性能方面与相应的共价交联聚合物的稳定性相匹配。此外，离子交联提供热塑性加工性和形状记忆辅助的自修复。
An ionically cross-linked syndiotactic polypropylene (ix-sPP) was synthesized by subsequent grafting of maleic anhydride (MA) to the polymer followed by compounding with ZnO. The polymer network was investigated by X-ray scattering, transmission electron microscopy, and various thermal and mechanical analyses. The optimized polymer network with 1 wt % MA grafting and 20 wt % ZnO exhibits a crystal melting temperature of 125 degrees C and rubber elastic behavior up to 203 degrees C and becomes a viscous polymer melt at higher temperatures. This process is fully reversible. Further, ix-sPP is an exceptionally stable ionic polymer network that matches the stability of the respective covalently cross-linked polymer in terms of shape memory properties. Additionally, the ionic cross-linking affords thermoplastic processability and shape memory assisted self-healing.