کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5191339 1381230 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A broad spectrum analysis of the dielectric properties of poly(2-hydroxyethyl methacrylate)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
A broad spectrum analysis of the dielectric properties of poly(2-hydroxyethyl methacrylate)
چکیده انگلیسی
The dielectric permittivity, ε′, and the loss factor, ε″, of dry poly(2-hydroxyethyl methacrylate) were measured using a dielectric analyzer in the frequency range of 0.1 Hz to 100 kHz and between the temperature range of −150 to 275 °C. The dielectric response of the sub-Tgγ transition of PHEMA has been widely studied before but little to no DEA data above 50 °C is present in the literature. In this study the dielectric spectrum is presented up to and above the Tg. The electric modulus formalism is used to reveal the γ, β, α and conductivity relaxations. The apparent activation energies for the relaxations are presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 11, 11 May 2005, Pages 3847-3855
نویسندگان
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