出版日期：2005-01-01 00:00:00

著者：張正良; Chang, C. L.; Lin, Y. K

單位：淡江大學化學工程與材料工程學系

出版者：Elsevier

著錄名稱、卷期、頁數：Polymer Degradation and Stability 87(1), pp.207-211

摘要：Base-catalysed aminolysis and ethanolysis of room temperature vulcanised poly(dimethylsiloxane) networks were studied with the aid of a model compound, tetrakis(trimethylsiloxy)-silane. Ethanol and ethylamine were used as nucleophilic reagents. The nucleophilicities of the reagents were enhanced by addition of potassium hydroxide. Kinetic models for the aminolysis and alcoholysis reactions at the initial stage were developed. The models reasonably predict the experimental data. Initial rate analysis was employed to determine the parameters of aminolysis and ethanolysis rate expressions. The overall activation energy of the aminolysis reaction is 14 kJ/mol. The initial rate of aminolysis was faster than that of ethanolysis. However, aminolysis reached equilibrium much faster than ethanolysis. When competition occurred in the reaction system, the aminolysis reaction dominates nucleophilic substitution at the initial stage and is followed by ethanolysis in a subsequent step.

關鍵字：Aminolysis;Alcoholysis;Base catalyst;Model compound;Poly(dimethylsiloxane) network

語言：en

ISSN：0141-3910

期刊性質：國內

審稿制度：否

國別：TWN

出版型式：電子版