کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9560342 | 1381978 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Competition of aminolysis and alcoholysis in nucleophilic cleavage of a model compound for polysiloxane networks
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Competition of aminolysis and alcoholysis in nucleophilic cleavage of a model compound for polysiloxane networks Competition of aminolysis and alcoholysis in nucleophilic cleavage of a model compound for polysiloxane networks](/preview/png/9560342.png)
چکیده انگلیسی
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 14Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 87, Issue 1, January 2005, Pages 207-211
Journal: Polymer Degradation and Stability - Volume 87, Issue 1, January 2005, Pages 207-211
نویسندگان
C.L. Chang, Y.K. Lin,