Synthesis, Thermal Degradation and Dielectric Properties of Poly[octyl(triphenylethynyl)]silane Resin  

作　　者：WANG Yanli TAN Dexin 

机构地区：[1]School of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang 524048,P.R.China

出　　处：《Chemical Research in Chinese Universities》2019年第6期1076-1081,共6页高等学校化学研究（英文版）

基　　金：Supported by the Natural Science Foundation of Guangdong Province,China(No.2017A030307028);the Special Fund for Science and Technology Innovation Strategy of Guangdong Province,China(No.2018A01005);the Yangfan Plan of Guangdong Province,China(No.0003017011);he Research Initiation Foundation of the Lingnan Normal University,China(Nos.ZL1604,ZL1822).

摘　　要：Octyl(triphenylethynyl)silane monomer(OTPES)was synthesized with ethyl bromide,octyltrichlorosilane and phenylethylene by Grignard reaction.The molecular structure was confirmed by FTIR and NMR.The poly[octyl(triphenylethynyl)]silane resin(POTPES)was prepared by thermal polymerization and the corresponding thermal degradation behavior wasstudied by thermogravimetric analysis(TG)combining with model and model-free fitted methods.The dielectric property of resin was also studied by vector network analyzer.The results show that the melt point of OTPES was 50℃ and the processing window was over 236℃.The resin degradation temperature of Td5 occurred over 433℃ and the char yield was over 60%at 800℃.Based on Kissinger,Flynn-Wall-Ozawa,Coats-Redfern,Achar,Vyazovkin-Wight and Tang methods,the reaction activity(E)was 155.51,152.97,150.82,146.02,148.38 and 148.77 kJ/mol,respectively.Dielectric properties analysis displayed that the real part(ε′)and the imaginary part(ε″)of the relative complex permittivity of POTPES was 2.5 and 0.05,respectively,and the dielectric loss tangent was between 0.03 and 0.25.The reflection loss of resin was more than?2.85 dB in all range of 1–5 mm thicknesses and 2–18 GHz frequency,which indicated that POTPES resin was a real wave-transparent resin matrix.

关 键 词：Octyl(triphenylethyny1)silane GRIGNARD reaction THERMAL POLYMERIZATION THERMAL degradation behavior DIELECTRIC property 

分 类 号：O62[理学—有机化学]