文献类型：期刊文献

英文题名：Star-shaped arylacetylene resins derived from silicon

作者：Dai, Niping[1];Tang, Junkun[1];Ma, Manping[1];Liu, Xiaotian[1];Li, Chuan[1];Huang, Farong[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：2020

卷号：40

期号：8

起止页码：676

外文期刊名：JOURNAL OF POLYMER ENGINEERING

收录：;EI(收录号：20203509095402);WOS:【SCI-EXPANDED(收录号:WOS:000569798800006)】；

基金：This work is supported by the Fundamental Research Funds for the Central Universities (grant nos. 50321042017001 and 222201814003), the Collaborative Fund of Ministry of Education and Equipment Development Department (grant no. 6141A02033226) and the National Natural Science Foundation of China (grant no. 21805088).

语种：英文

外文关键词：heat-resistant material; mechanical property; processability; star-shaped resins

摘要：Star-shaped arylacetylene resins, tris(3-ethynyl-phenylethynyl)methylsilane, tris(3-ethynyl-phenylethynyl) phenylsilane, and tris (3-ethynyl-phenylethynyl) silane (TEPHS), were synthesized through Grignard reaction between 1,3- diethynylbenzene and three types of trichlorinated silanes. The chemical structures and properties of the resins were characterized by means of nuclear magnetic resonance, fourier-transform infrared spectroscopy, Haake torque rheomoter, differential scanning calorimetry, dynamic mechanical analysis, mechanical test, and thermogravimetric analysis. The results show that the melt viscosity at 120 degrees C is lower than 150 mPa.s, and the processing windows are as wide as 60 degrees C for the resins. The resins cure at the temperature as low as 150 degrees C. The good processabilities make the resins to be suitable for resin transfer molding. The cured resins exhibit high flexural modulus and excellent heat-resistance. The flexural modulus of the cured TEPHS at room temperature arrives at as high as 10.9 GPa. Its temperature of 5% weight loss (T-d5) is up to 697 degrees C in nitrogen. The resins show the potential for application in fiber-reinforced composites as high-performance resin in the field of aviation and aerospace.