为研究聚乙烯基三苯乙炔基硅烷树脂的热分解机理,利用TG-DTG技术探讨了聚乙烯基三苯乙炔基硅烷树脂的非等温热分解过程.借助非模型拟合法和模型拟合法分析了聚乙烯基三苯乙炔基硅烷树脂(PVTPES)的热分解行为,建立了动力学函数,得到了聚...为研究聚乙烯基三苯乙炔基硅烷树脂的热分解机理,利用TG-DTG技术探讨了聚乙烯基三苯乙炔基硅烷树脂的非等温热分解过程.借助非模型拟合法和模型拟合法分析了聚乙烯基三苯乙炔基硅烷树脂(PVTPES)的热分解行为,建立了动力学函数,得到了聚乙烯基三苯乙炔基硅烷树脂的热分解反应机理.结果表明,6种热分析方法计算得到PVTPES的热分解活化能(E)在240 k J/mol左右,指前因子lg A=15.51,机理符合三维(3D)扩散控制机理.聚合物PVTPES的热分解过程分析进一步证实芳炔单体的热聚合为环三聚反应.展开更多
The imine salt was formed initially by the addition of an organolithium compound to the aromatic nitricle.This type of reaction usually leads to cyclic products,such as triazines.We discussed the mechanism of organoli...The imine salt was formed initially by the addition of an organolithium compound to the aromatic nitricle.This type of reaction usually leads to cyclic products,such as triazines.We discussed the mechanism of organolithium compounds catalyzed trimerization of nitriles and study the catalystic charateristics.Using this new method,the yield of triazines was improved.展开更多
文摘为研究聚乙烯基三苯乙炔基硅烷树脂的热分解机理,利用TG-DTG技术探讨了聚乙烯基三苯乙炔基硅烷树脂的非等温热分解过程.借助非模型拟合法和模型拟合法分析了聚乙烯基三苯乙炔基硅烷树脂(PVTPES)的热分解行为,建立了动力学函数,得到了聚乙烯基三苯乙炔基硅烷树脂的热分解反应机理.结果表明,6种热分析方法计算得到PVTPES的热分解活化能(E)在240 k J/mol左右,指前因子lg A=15.51,机理符合三维(3D)扩散控制机理.聚合物PVTPES的热分解过程分析进一步证实芳炔单体的热聚合为环三聚反应.
文摘The imine salt was formed initially by the addition of an organolithium compound to the aromatic nitricle.This type of reaction usually leads to cyclic products,such as triazines.We discussed the mechanism of organolithium compounds catalyzed trimerization of nitriles and study the catalystic charateristics.Using this new method,the yield of triazines was improved.
