Diels-Alder-Based Crosslinked Self-Healing Polyurethane/Urea from Polymeric Methylene Diphenyl Diisocyanate
Diels-Alder-Based Crosslinked Self-Healing Polyurethane/Urea from Polymeric Methylene Diphenyl Diisocyanate
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DOI：
10.1002/app.40234
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发表时间：
2014-05-05
影响因子：
3
通讯作者：
Zhang, Yuefan
中科院分区：
文献类型：
--
作者：
Du, Pengfei;Wu, Meiyin;Zhang, Yuefan
以多呋喃单体和商业双马来酰亚胺为原料，采用diols - alder反应合成了自愈交联聚氨酯/尿素（C-PMPU-DA）。以糠醛胺为原料，将MDI: PBA-2000=2:1的聚合物功能化，得到了多呋喃单体（pmpu -呋喃）。采用衰减全反射(ATR)-傅里叶变换红外（FTIR）光谱、差示扫描量热法、热重分析和h -1核磁共振对pmpu -呋喃和C-PMPU-DA的结构进行了表征。Diels-Alder键使C-PMPU-DA具有热可逆性，并通过ATR-FTIR光谱、h -1 nmr、凝胶-溶液-凝胶实验和粘度测试进行了研究。同时，通过力学性能的恢复，研究了C-PMPU-DA的自愈性能。结果表明，C-PMPU-DA具有良好的热可逆性和自愈性。C-PMPU-DA在室温下表现出热固性，但在高温下表现出热塑性，可以应用于自修复材料、可回收材料或可移动材料。(c) 2013 Wiley Periodicals, Inc.；j:。变异较大。自然科学学报，2014,31(4):4034 - 4034。
Crosslinked self-healing polyurethane/urea based on a Diels-Alder reaction (C-PMPU-DA) was synthesized from a multiple-furan monomer and a commercial bismaleimide. The multiple-furan monomer (PMPU-furan) was obtained from a functionalized prepolymer (polymeric MDI: PBA-2000=2:1) by furfuryl amine. The structures of both the PMPU-furan and C-PMPU-DA were characterized by attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and H-1-NMR. The Diels-Alder bonds enabled C-PMPU-DA thermal reversibility, which was investigated by ATR-FTIR spectroscopy, H-1-NMR, gel-solution-gel experiments, and viscosity tests. Meanwhile, the self-healing properties of C-PMPU-DA were also investigated by the recovery of the mechanical properties. The results showed that C-PMPU-DA exhibited good thermal reversibility and self-healing properties. C-PMPU-DA exhibited thermosetting properties at room temperature, although it exhibited thermoplastic properties at higher temperatures and may find applications in self-healing materials, recyclable materials, or removable materials. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40234.