文献类型：期刊文献

英文题名：Synthesis and properties of a novel silicon-containing phthalonitrile resin and its quartz-fiber-reinforced composites

作者：Hu, Junjie[1];Hu, Yanhong[1];Deng, Shi Feng[1];Zhou, Jia li[1];Jiang, Ning[1];Zhu, Yi[1];Sun, Ming[1]

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

年份：2020

卷号：32

期号：10

起止页码：1112

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20202608869375);WOS:【SCI-EXPANDED(收录号:WOS:000542769200001)】；

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 Fundamental Research Funds for the Central Universities (50321042017001).

语种：英文

外文关键词：Polymer composites; phthalonitrile; silicon-containing resin; composite laminates; thermal and mechanical properties

摘要：A novel silicon-containing phthalonitrile monomer named bis(4-(4 '-(4 '-phenoxy)phenyl)phenyl)dimethylsilane phthalonitrile (SiBPPN) was successfully designed and synthesized. The chemical structure was characterized by proton nuclear magnetic resonance and Fourier transform infrared (FTIR) analyses, and its molecular weight was determined by mass spectrometry. Its melting point is lower than that of 4,4 '-bis(3,4-dicyanophenoxy)biphenyl (BPPN), which has no silicon atom, and its solubility is also much better than that of BPPN. The curing behavior of SiBPPN was studied by differential scanning calorimetry and FTIR analyses in detail. The thermal and thermomechanical properties of the polymer and laminate were studied by thermogravimetric analysis and dynamic mechanical analysis. The results show that the cured SiBPPN (c-SiBPPN) possesses excellent thermal and mechanical properties. Under nitrogen atmosphere, its residual weight ratio at 800 degrees C is 81.5% and the 5% thermal degradation temperature is 546 degrees C. In addition, quartz-fiber (QF)-reinforced c-SiBPPN composites exhibit mechanical properties superior to those of QF-reinforced cured BPPN composites. The interlaminar shear strength and bending strength of the composite are 30.44 and 389 MPa at room temperature, and the interlaminar shear strength and bending strength of the composite are 22.25 and 339 MPa at 300 degrees C.