کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1485932 | 1510551 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of activation energy of viscous flow of sol-gel derived phenyl-modified silica glass
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کلمات کلیدی
61.43.Fs61.43.ErGlass transition - انتقال شیشهAerogel and solution chemistry - ایرگل و محلول شیمیGlass melting - ذوب شیشه ایSol–gel - سل ژلSilica - سیلیس یا سیلیکاGlass formation - شکل گیری شیشهGlasses - عینکOrganic–inorganic hybrids - هیبرید های ارگانیک-غیر ارگانیکViscosity and relaxation - ویسکوزیته و آرامشViscosity - ویسکوزیته یا گرانروی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The temperature-induced softening behavior in sol-gel derived phenyl-modified low-melting glass (phenyl glass) was investigated in terms of the activation energy for the viscous flow. The temperature dependence of the relative viscous flow was measured from the falling rate of a needle loaded with a constant weight. The activation energy for the viscous flow of phenyl-modified silica glass was found to be irrespective of the time of drying the sample phenyl-modified silica glass, which directly affects the extent of polymerization. Furthermore, the obtained activation energy was in considerably good agreement with that for the viscous flow of potassium alkali glass, and approximately twice larger than that of linear amorphous polymer (polystyrene). This result suggests the common microstructural feature of glassy materials interspaced by additive substances like Na/K or covalently bonded chemical functions such as phenyl groups.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 30â31, 1 September 2006, Pages 3175-3178
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 30â31, 1 September 2006, Pages 3175-3178
نویسندگان
Yoshihiro Kamimura, Ken-ichi Kurumada, Kohei Asaba, Hidekuni Ban-no, Hisashige Kambara, Masahiko Hiro,