کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189929 | 1381194 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of poly(2-hydroxyethyl methacrylate-silica) hybrid materials with different silica contents
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Poly(2-hydroxyethyl methacrylate-silica) hybrid materials with significantly lower volume shrinkage were synthesized by using acid-catalyzed sol-gel reactions of tetraethyl orthosilicate and free radical polymerization of 2-hydroxyethyl methacrylate (HEMA). The mechanical, thermal, and optical properties and internal porosities of the poly(HEMA-silica) hybrids with different silica contents (e.g., 15, 25 and 30Â wt%) were evaluated with the use of nanoindentation, microscratch, thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, UV-vis spectrophotometer and N2 adsorption-desorption method. A silica percolation threshold was found at around 20-25Â wt%, beyond which a marked increase in the poly(HEMA-silica) hybrid hardness and modulus was observed as compared to pure poly(HEMA). Nanoindentation and scratch testing measurements also for the first time were introduced in characterizing poly(HEMA-silica) hybrid materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 48, Issue 14, 29 June 2007, Pages 3982-3989
Journal: Polymer - Volume 48, Issue 14, 29 June 2007, Pages 3982-3989
نویسندگان
Shuxi Li, Apoorva Shah, Alex J. Hsieh, Ross Haghighat, S. Solomon Praveen, Indraneil Mukherjee, Elizabeth Wei, Zongtao Zhang, Yen Wei,