文献类型：期刊文献

英文题名：Cure behavior and mechanism of cyanate ester with aromatic amines at room temperature

作者：Zhou, Junjie[1];Guo, Kangkang[2];Wang, Fan[1];Zhu, Yaping[1];Qi, Huimin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Mater Wing Mat Sci & Technol Su Zhou Co Ltd, Shanghai, Peoples R China

年份：2023

卷号：35

期号：10

起止页码：977

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20233714719765);WOS:【SCI-EXPANDED(收录号:WOS:001058143700001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, and supported by the Fundamental Research Funds for the Central Universities (50321041918013 and 50321041917001).

语种：英文

外文关键词：Amine curing agents; cyanate ester; room temperature curing

摘要：Herein, the catalytic effects of aromatic amines with different structures on the room temperature curing of bisphenol E cyanate (BECy) have been studied using differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectroscopy. Our results revealed that the mixed amine comprised of aniline and N,N-dimethyl-p-phenylenediamine (AN/NNDPA) bearing primary amino groups in its structure was a highly effective catalyst for the room temperature curing of cyanate esters. When the cyanate ester and mixed amine were combined at a molar ratio of 100:5 and cured at room temperature for 5 days, the curing degree of BECy resin reached 79.7%. The room temperature curing mechanism of the BECy-AN/NNDPA system was investigated using pyrolysis gas chromatography-mass spectrometry (PY GC-MS). Our results showed that the formation reactions of the intermediate structure and cyclotrimerization reactions occurred during the room-temperature curing process. The activation energies of BECy and different aromatic amine systems at different heating rates were determined using non-isothermal DSC. The results further demonstrated the catalytic effect of AN/NNDPA on the cyanate ester curing reaction. BECy-AN/NNDPA cured at room temperature has suitable heat resistance and a 5% weight loss temperature (Td5) of 361 & DEG;C.