文献类型：期刊文献

英文题名：Preparation and properties of novel low dielectric constant benzoxazole-based polybenzoxazine

作者：Zhang, Kan[1];Zhuang, Qixin[1];Zhou, Yunchao[1];Liu, Xiaoyun[1];Yang, Guang[1];Han, Zhewen[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China

年份：2012

卷号：50

期号：24

起止页码：5115

外文期刊名：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

收录：;EI(收录号：20124715691304);WOS:【SCI-EXPANDED(收录号:WOS:000311106400014)】；

基金：The authors express their gratitude to the National Natural Science Foundation of China (NSFC) for their financial support (contract grant numbers 50703010 and 50973028). This project is also supported by Innovation Program of Shanghai Municipal Education Commission (12ZZ049) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：benzoxazine; benzoxazole; dielectric properties; high-performance polymers; thermal properties

摘要：A novel benzoxazine monomer containing a benzoxazole group was synthesized using a nonsolvent method and then named DAROH-a. The structure of DAROH-a was confirmed by FTIR, 1H NMR, elemental analysis, and mass spectrometry. The curing reaction activation energy was calculated at 140 kJ/mol. Its corresponding crosslinked polybenzoxazines, poly(DAROH-a), displayed a higher glass transition temperature at 402 degrees C, a 9% weight loss at the said temperature, and a high char yield of 42 wt % (800 degrees C, in nitrogen). Moreover, the dielectric constants of poly(DAROH-a) were low and changed only slightly at different temperatures. Furthermore, the dielectric constants and dielectric loss of poly(DAROH-a) at the same frequency barely changed from room temperature to 150 degrees C. The photophysical properties of poly(DAROH-a) film were also investigated. Poly(DAROH-a) showed an absorption peak at 280 nm. The photoluminescent emission spectrum of poly(DAROH-a) film displayed predominant emission peaks at 521 nm. It might have potential application as high-performance materials because of its excellent dielectric constants stability and thermal stability under high temperature. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012