An m-phenylenediamine-based benzoxazine with favorable processability and its high-performance thermoset
An m-phenylenediamine-based benzoxazine with favorable processability and its high-performance thermoset
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DOI：
10.1002/app.43368
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发表时间：
2016-05
影响因子：
3
通讯作者：
Shitong Ren;Xin Yang;Xiaojuan Zhao;Ying Zhang;Wei Huang
中科院分区：
文献类型：
--
作者：
Shitong Ren;Xin Yang;Xiaojuan Zhao;Ying Zhang;Wei Huang
以间苯二胺（m-PDA）、2-羟基苯甲醛和甲醛为原料合成了新型芳香二胺基苯并恶嗪（P-mPDA）。研究了P-mPDA的聚合行为及其热固性性能。结果表明，P-mPDA具有较低的聚合温度、较低的液化温度和较宽的加工窗口等良好的加工性能。甚至更低的聚合温度（聚合起始温度低至80℃）可以通过催化剂的促进实现。P-mPDA开环聚合首先生成N， o -缩醛型结构和芳胺型曼尼希型结构的聚苯并杂嗪，然后在高温下从N， o -缩醛型结构重排到酚型曼尼希型结构。此外，聚合后的P-mPDA具有极高的玻璃化转变温度（T-g）（280℃），在氮气作用下800℃炭收率高达53%以上以及优异的力学性能。(c) 2016 Wiley Periodicals, Inc.；j:。变异较大。科学通报，2016,33(3):43368。
A novel aromatic diamine-based benzoxazine (P-mPDA) is successfully synthesized from m-phenylenediamine (m-PDA), 2-hydroxybenzaldehyde, and formaldehyde. The polymerization behavior of P-mPDA and the properties of its thermoset are studied. The results indicate that P-mPDA owns favorable processability including low polymerization temperature, low liquefying temperature, and wide processing window. Even lower polymerization temperature (polymerization onset temperature as low as 80 degrees C) can be achieved by the promotion of catalysts. The ring-opening polymerization of P-mPDA first generates polybenzoxazine with N, O-acetal-type structure and arylamine Mannich-type structure, following which rearrangement from N, O-acetal-type structure to phenolic Mannich-type structure proceeds at elevated temperature. Furthermore, the polymerized P-mPDA shows outstanding performance such as extremely high glass transition temperature (T-g) of 280 degrees C, high char yield above 53% at 800 degrees C under nitrogen and excellent mechanical property. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43368.