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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Evaluation of activation energy of viscous flow of sol-gel derived phenyl-modified silica glass
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 30–31, 1 September 2006, Pages 3175-3178
نویسندگان
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