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聚苯基三苯乙炔基硅烷的制备及热分解动力学 被引量:12

Preparation and thermal decomposition kinetics of poly (phenyl (triphenylethynyl) silane)s
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摘要 以苯乙炔和苯基三氯硅烷为原料,通过格氏反应制备了可反应型苯基三苯乙炔基硅烷单体,利用红外、核磁对其结构进行了表征。以此为原料,通过热聚合法制备了高残炭率的含硅芳炔树脂,该树脂的Td5分解温度约570℃,800℃时聚合物的残炭率约75%。利用TGA-DTG研究了该聚合物的热分解动力学,并计算了相应动力学参数。用Kissinger法和Ozawa法求得的聚合物热分解活化能分别为295.82 kJ/mol和262.70 kJ/mol;用Crane法求得聚合物的热分解反应级数为0.96,反应近似为一级反应。 Using phenylethynylene and phenyltrichlorosilane as raw materials, phenyhri ( phenylethynyl ) silane [( ph-C ≡ C ) 3= Si-ph] (PTPES)was synthesized by Grignard reaction. The molecular structure was characterized by means of Fouruier transform infrared (FT-IR) and nuclear magnetic resonance (NMR). The polymer of poly ( phenyhri (phenylethynyl) silane ) s was prepared by thermal polymerization with high char yield. The Td5 temperature of the polymer was about 570 ℃ and the char yield was about 75 % at 800 ℃ and the corresponding thermal decomposition kinetic parameters, such as activation energy( Ea )and the order of the reaction (n)were also obtained according to the Kissinger and Ozawa methods by TGA-DTG. The results show that the Ea values were 295.82 kJ/mol and 262.70 kJ/mol by two methods, respectively. The reaction order was 0.96 by Crane equation and the de- composition reaction was first order reaction.
出处 《固体火箭技术》 EI CAS CSCD 北大核心 2013年第3期385-389,共5页 Journal of Solid Rocket Technology
基金 国家自然科学基金(51173002) 安徽省高校自然科学基金重点项目(KJ2013A087 KJ2013A095) 安徽理工大学博士基金
关键词 苯乙炔 苯基三氯硅烷 格氏反应 苯基三苯乙炔基硅烷 热分解动力学 phenylethynylene phenyhrichlorosilane Grignard reagent phenyltri ( phenylethynyl ) silane thermal decomposition kinetics
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