کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1484811 1510531 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of analysis of dielectric spectra of PCL in the ε∗ and the M∗ formalism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Comparison of analysis of dielectric spectra of PCL in the ε∗ and the M∗ formalism
چکیده انگلیسی

The complex dielectric modulus, M∗(ω, T), for poly(ε-caprolactone) has been obtained by inverting the complex dielectric permittivity data, ε∗(ω, T) recorded in a wide temperature and frequency range. The analysis of the dielectric loss modulus spectra M″(ω, T) have been performed by using a simulated annealing Monte Carlo procedure in order to extract the relaxation parameters for each relaxation mode. Besides the local modes γ and β, the segmental α mode associated to the glass transition, the conductivity and the interfacial polarization peaks could be analyzed with a better precision than by using the conventional non-linear least squares method in ε″ domain. The merging of the α and β modes at high temperatures is much better defined due to the less significant contribution of the ionic conductivity in M∗ formalism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 353, Issues 47–51, 1 December 2007, Pages 4283–4287
نویسندگان
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