二甲基-二(3-乙炔基苯胺)硅烷的固化反应及其动力学

摘要: 利用非等温差示扫描量热法(DSC)得到了二甲基-二(3-乙炔基苯胺)硅烷(DMEAS)的特征固化参数,采用Kissinger和Ozawa法计算得到DMEAS固化反应表观活化能(ΔE)分别为100.6、113.0 kJ/mol;通过FT-IR研究了DMEAS固化前后的结构变化,采用TGA分析了其固化物的耐热性。结果表明:DMEAS固化反应主要是乙炔基发生交联反应,形成空间网状结构;在氮气中,DMEAS固化物的热降解起始温度(Td5)为563℃,900℃时的质量残留率为84.0%。

Abstract: The curing reaction of dimethyldi(3ethynylphenylamino)silanes （DMEAS）was studied with DSC analysis. Based on Kissinger and Ozawa methods, the apparent activation energy(ΔE) were 100.6 kJ/mol and 113.0 kJ/mol, respectively.The curing reaction and heat resistance were investigated with FTIR and TGA. Results show that crosslinking reaction of acetylene occured and crosslinked structure form during DMEAS′s curing reaction; the temperature of 5% mass loss(Td5) is 563 ℃, and mass remaining at 900 ℃ is 84.0% under nitrogen.