کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5186564 1381107 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of polysilsesquioxane having dimethylamino group and grafted thermoresponsive polymer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Preparation of polysilsesquioxane having dimethylamino group and grafted thermoresponsive polymer
چکیده انگلیسی

The polysilsesquioxane having mercapto, dimethylamino, and phenyl groups (PAMPSQ) was prepared from the corresponding trimethoxysilanes by co-condensation under basic conditions. The mercapto group on PAMPSQ was utilized as an initiator for graft copolymerization of N-isopropylacrylamide and N,N-dimethylacrylamide. The grafting of the copolymer proceeded effectively to give the thermoresponsive polysilsesquioxane derivative (GrPSQ) without the formation of gel product. The obtained GrPSQ was amphiphilic and provided the property of thermoresponsive reversible aggregation. The aggregation temperatures of GrPSQ varied in buffer solutions showing different pH values. Furthermore, the formation of ammonium salts utilizing dimethylaminio groups with carboxylic acids or halogen compounds led to a rise in aggregation temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 22, 18 October 2006, Pages 7693-7701
نویسندگان
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