Synthesis, characterization, and polymerization of a novel benzoxazine based on diethyltoluenediamine
Synthesis, characterization, and polymerization of a novel benzoxazine based on diethyltoluenediamine
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基于二乙基甲苯二胺的新型苯并恶嗪的合成、表征和聚合
DOI：
10.1002/app.41920
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发表时间：
2015-05-05
影响因子：
3
通讯作者：
Huang, Wei
中科院分区：
文献类型：
--
作者：
Ren, Shitong;Yang, Xin;Huang, Wei
以二乙基甲苯二胺（DETDA）、苯酚和多聚甲醛为原料，采用简单的无溶剂一步法合成了一种新型芳香二胺基苯并恶嗪单体（PDETDA）。通过FTIR、1H NMR和13C NMR对PDETDA的结构进行了表征。用DSC、FTIR和流变学方法研究了PDETDA的固化行为。结果表明，DETDA中苯环上的烷基取代基不仅有效地阻碍了三嗪网络的形成，从而有利于PDETDA的合成，而且赋予了PDETDA低粘度（90°C时为1 Pa s）的优点。然而，取代基的空间位阻使得PDETDA难以通过开环聚合形成交联网络，因此仅得到低聚物和非交联聚合物。用非等温DSC研究了PDETDA的固化动力学，结果表明PDETDA的固化反应具有自催化特性。© 2015 Wiley Periodicals，Inc. J.应用聚合物Sci. 2015，132，41920。
A novel aromatic diamine-based benzoxazine monomer (PDETDA) was successfully prepared from diethyltoluenediamine (DETDA), phenol, and paraformaldehyde through a simple one-step solvent-less method. The structure of PDETDA was confirmed by FTIR, 1H NMR, and 13C NMR. The curing behavior of PDETDA was studied by DSC, FTIR, and rheological measurement. The results showed that the alkyl substituents on the benzene ring in DETDA not only facilitated the synthesis of PDETDA by effectively hindering the formation of triazine network, but also endowed PDETDA with the advantage of low viscosity (1 Pa s at 90°C). However, steric hindrance of the substituents made PDETDA difficult to form a crosslinked network through ring-opening polymerization, and therefore only oligomers and noncrosslinked polymers were obtained. The curing kinetics of PDETDA was studied by nonisothermal DSC, and the results revealed that the curing of PDETDA displayed autocatalytic characteristic. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41920.