Self-healing bio-based furan polymers cross-linked with various bis-maleimides
Self-healing bio-based furan polymers cross-linked with various bis-maleimides
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DOI：
10.1016/j.polymer.2013.07.059
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发表时间：
2013-09
期刊：
影响因子：
4.6
通讯作者：
C. Zeng;H. Seino;Jie Ren;K. Hatanaka;N. Yoshie
中科院分区：
文献类型：
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作者：
C. Zeng;H. Seino;Jie Ren;K. Hatanaka;N. Yoshie
通过Diels-Alder反应，将呋喃类聚合物聚（2，5-呋喃二亚甲基琥珀酸酯）与双马来酰亚胺化合物交联，制备了一系列生物基自修复聚合物。除了双马来酰亚胺连接基的量之外，双马来酰亚胺的分子结构在确定Diels-Alder反应的程度以及聚合物的机械和愈合性质方面起关键作用。双马来酰亚胺与亚苯基环显着提高网络聚合物的拉伸强度，但阻碍愈合。相比之下，具有柔性分子结构的双马来酰亚胺倾向于改善聚合物伸长率，从而提供具有优异愈合能力的聚合物。具有柔性长链烷基段的双马来酰亚胺交联的网状聚合物的自愈合（=在没有任何外部刺激的情况下的愈合）和在溶剂（CHCl 3）辅助下的愈合效率分别超过70%和80%。因此，我们的研究结果表明，双马来酰亚胺连接基的选择是一个重要的因素，设计呋喃-马来酰亚胺基自修复聚合物。
A series of bio-based self-healing polymers was prepared by cross-linking a furan polymer, poly(2,5-furandimethylene succinate), with bis-maleimide compounds by means of Diels–Alder reactions. In addition to the amount of the bis-maleimide linker, the molecular structure of the bis-maleimide played a key role in determining the extent of the Diels–Alder reaction and the mechanical and healing properties of the polymers. Bis-maleimides with phenylene rings markedly enhanced the tensile strength of the network polymers but hindered healing. In contrast, bis-maleimides with a flexible molecular structure tended to improve the polymer elongation, affording polymers with excellent healing ability. The efficiencies of self-healing (=healing without any external stimulus) and healing with an assistance of solvent (CHCl3) were over 70% and 80%, respectively, for the network polymer crosslinked by bis-maleimide with flexible long-alkyl segment. Thus, our results indicate that the choice of bis-maleimide linker is an important factor for designing furan-maleimide–based self-healing polymers.