文献类型：期刊文献

英文题名：Preparation of hybrid cyanate ester resin in the presence of polysilazane and its properties

作者：Huo, Xiaomeng[1];Guo, Kangkang[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 Tec, Minist Educ, Shanghai 200237, Peoples R China

年份：2021

卷号：33

期号：2

起止页码：184

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20203409085544);WOS:【SCI-EXPANDED(收录号:WOS:000561701500001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work is 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 & Technology, and supported by the Fundamental Research Funds for the Central Universities (50321041918013 and 50321041917001).

语种：英文

外文关键词：Bisphenol-A dicyanate ester; polysilazane; reactivity; processability; thermal performance

摘要：A hybrid cyanate ester resin containing polysilazane was prepared via the prepolymerization of bisphenol-A dicyanate ester monomer (BADCy) in the presence of polysilazane (PSZ) under low temperature conditions in a short period of time. Fourier transform-infrared (FT-IR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy reveal that the polymerization reaction of BADCy can be carried out in the presence of PSZ to obtain a hybrid resin below 100 degrees C and polymethylsilazane (PHS) exhibits an improved prepolymerization effect when compared to polydimethylsilazane (PMS). FT-IR spectroscopy and gel permeation chromatography (GPC) showed that the prepolymerization degree of the PHS/BADCy resin increased upon increasing PHS mass fraction from 0 to 12 wt%, polymerization temperature from 60 to 100 degrees C and polymerization time from 0 to 4 h. The PHS/BADCy hybrid resins samples were prepared and their process properties were investigated by rheometry and Differential scanning calorimetry (DSC). The results indicated that their viscosity was <10 Pa.s in the temperature range of 60-130 degrees C, and the initial curing temperature and curing exothermic enthalpy were 121.9 degrees C and 358.9 J/g, respectively. Furthermore, the cured PHS/BADCy resin possesses excellent thermal and mechanical properties, the 5% weight loss temperature (T-d5) and glass transition temperature (T-g) were 424-441 degrees C and 273-282 degrees C, respectively. The cured PHS/BADCy resin with 4 wt% PHS showed the highest flexural strength of 146 MPa and flexural modulus of 4.1 GPa.