标题:Impacts of Different Functional Groups on the Kinetic Rates of alpha-Amine Ketoximesilanes Hydrolysis in the Preparation of Room Temperature Vulcanized Silicone Rubber
作者:Xu, Huihui; Liu, Zihou; Liu, Qingyang; Bei, Yiling; Zhu, Qingzeng
作者机构:[Xu, Huihui; Liu, Zihou; Bei, Yiling; Zhu, Qingzeng] Shandong Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Special Funct Aggregated Mat, Jinan 250 更多
通讯作者:Bei, YL
通讯作者地址:[Bei, YL]Shandong Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Special Funct Aggregated Mat, Jinan 250100, Shandong, Peoples R China.
来源:MATERIALS
出版年:2018
卷:11
期:5
DOI:10.3390/ma11050790
关键词:alpha-amine ketoximesilanes; hydrolysis reaction; self-crosslinkers; RTV; silicone rubber
摘要:alpha-Amine ketoximesilanes are proven to be effective crosslinkers in the preparation of ketone-oxime one-component room temperature vulcanized (RTV) silicone rubber without the use of toxic metal catalyst. This work aimed to investigate the hydrolysis kinetic of alpha-amineketoximesilanes, which is vitally important for the preparation of RTV silicone rubber. Five kinds of alpha-amine ketoximesilanes, namely alpha-(N, N-diethyl) aminomethyltri(methylethylketoxime) silane (DEMOS), alpha-(N, N-di-n-butyl) aminomethyltri(methylethylketoxime) silane (DBMOS), alpha-(N-n-butyl) aminomethyltri(methylethylketoxime) silane (n-BMOS), alpha-(N-cyclohexyl) aminomethyltri (methylethylketoxime) silane (CMOS) and alpha-(beta-aminomethyl) aminomethyltri(methylethylketoxime) silane (AEMOS), were successfully obtained and confirmed using Fourier transform infrared spectrometer (FT-IR) and hydrogen-1 nuclear magnetic resonance (H-1 NMR). Kinetics of hydrolysis reactions were measured by FT-IR and conductivity. Our results illustrated that the kinetic constant rates ranged from 12.2 x 10(4) s(-1) to 7.6 x 10(4) s(-1), with the decreasing order of DEMOS > n-BMOS > DBMOS > CMOS > AEMOS at the given temperature and humidity. Better performances of thermal stability could be achieved when using the alpha-amineketoximesilanes as crosslinkers in the preparation of RTV silicon rubber than that of RTV silicone rubber with the use of methyltri(methylethylketoxime) silane (MOS) as a crosslinker and organic tin as a catalyst.
收录类别:SCIE
资源类型:期刊论文
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