文献类型：期刊文献

英文题名：Mechanism and Properties of Aromatic Amines Room Temperature Catalyzed Curing of Cyanate Ester and Epoxy Resin System

作者：Zhou, Junjie[1];Jin, Chaoen[1];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 Techno, Minist Educ, Shanghai 200237, Peoples R China

年份：2025

卷号：10

期号：29

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001542347400001)】；

基金：This study was supported by 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：Adhesive; Cyanate ester; Epoxy ester; Room temperature curing

摘要：The room-temperature curing behavior of cyanate ester/epoxy resins in the presence of aromatic amines was comprehensively investigated by DSC and FTIR. Additionally, the curing mechanism was confirmed via PY-GC-MS. The results showed that in the reaction system, the catalyst not only promoted the formation of the triazine ring from the cyanate ester but also induced ring opening of the epoxy group. The ring-opened epoxy group then reacted with either the cyanate ester group or the intermediates containing & horbar;C & horbar;O & boxH;NH to generate oxazolidine. Subsequently, the oxazolidine underwent a rearrangement reaction, leading to the formation of oxazolidinone. After a 5-day reaction at room temperature, the curing degree of the resin system reached 80.6%, thus accomplishing room temperature polymerization. For room-temperature fast-curing adhesive applications, this reaction system not only ensures a relatively short initial curing time but also guarantees a minimum sizing time of 60 min. When the epoxy resin content was 20%, the cured system exhibited a Td5 (5% weight loss temperature) of 323 degrees C, a flexural strength of 71.43 MPa, and a tensile shear strength of 8.06 MPa, with vacuum volatility meets aerospace standards.