کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189653 | 1381189 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of physical aging on nano- and macroscopic properties of poly(methyl methacrylate) glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Physical aging of amorphous poly(methyl methacrylate) has been studied by low frequency Raman scattering, broad-band dielectric spectroscopy, low frequency high resolution mechanical spectroscopy and differential scanning calorimetry. The material was subjected to different thermal histories by isothermal aging. A consistent relationship between the changes caused by the physical aging in nanostructure and molecular dynamics has been found. The aging makes the structure more homogeneous at a scale of few nanometers, bringing it to a structural state of lower energy. These structural changes affect mainly the α-relaxation, however, some increase in the relaxation strength as well as an increase in the activation energy of the β-relaxation is also observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12523-12531
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12523-12531
نویسندگان
A. Wypych, E. Duval, G. Boiteux, J. Ulanski, L. David, A. Mermet,