Significant improvement on polybenzoxazine toughness achieved by amine/benzoxazine copolymerization induced phase separation
首发时间:2017-11-16
Abstract:Two commercially available amines, octanediamine (ODM) and m-xylylenediamine (MXDM), were chosen to tough polybenzoxazine resin due to their controllable capability to cause phase separation during the copolymerization with benzoxazine monomers. The toughing behavior and phase separation of the cured resins were investigated using tensile tests and analyses of DMA, SEM, and TGA-GC/MS. The resulting networks showed remarkable toughness without obvious degradation in thermo-mechanical performance. Especially, when ODM/MXDM molar ratio was 1:1, an elongation rate of 10.55% and a breaking strength of 82.67 Mpa, which are 86% and 128% higher than that of the neat benzoxazine resin, respectively, were achieved. These findings open a new way to improve toughness of brittle polybenzoxazine resins.
keywords: benzoxazine toughness phase separation
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关于胺/苯并噁嗪共聚诱导相分离行为增强聚苯并噁嗪韧性的研究
摘要:选择两种市售的胺,辛二胺(ODM)和间苯二甲胺来增韧苯并噁嗪树脂,因为他们在于苯并噁嗪单体共聚的过程中具有可控的相分离能力。使用拉伸试验机,动态热力学分析(DMA),扫面电镜(SEM),和热重分析仪-气相质谱联用(TGA-GC/MS)分析研究了固化树脂的韧性和相分离行为,所得到的显示出韧性增强,且没有明显的热机械性能损失。尤其当ODM:MXDM的摩尔比为1:1时,断裂伸长率10.55%,断裂强度达到了82.67Mpa, 分别比纯的聚苯并噁嗪要高出86%和128%,这些发现为热固性树脂苯并噁嗪的增韧提供了一个新思路。
关键词: 苯并噁嗪;韧性;相分离
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