摘要
采用气相色谱仪分析的方法,考察了六甲基二硅氮烷在不同pH值、不同温度下的水解情况.结果表明,六甲基二硅氮烷的水解可按一级反应来描述,在pH=7-pH=13的范围内,随着pH值的增加,水解速率降低;在208~308K的范围内,温度对水解速率影响显著,温度升高,水解速率明显加快,pH=7时水解活化能为28.81kJ·mol^-1.
Hydrolysis kinetics of hexamethyldisilazane(HMDS)was studied through gas chromatogram at various pH values and temperatures. The results show that the kinetic process of HMDS can be described by the first -order reaction, the hydrolysis rate reduced with the rising pH value in the range of pH =7 to pH = 13. In addition, the higher temperature was helpful to the hydrolytic process between 208 K and 308 K, the hydrolysis rate increased with the rise of temperature , the activation energy of HMDS hydrolysis was 28.81 kJ ·mol^ - 1 when pH = 7.
出处
《郑州大学学报(工学版)》
CAS
2008年第3期85-87,共3页
Journal of Zhengzhou University(Engineering Science)