کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1485745 | 1510547 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of low-concentration γ-Fe2O3 magnetic nanoparticles in a poly(ether-b-ester) copolymer matrix on interfacial polarization and glass transition
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
A new poly(ester-b-ether) copolymer filled with magnetic γ-Fe2O3 nanoparticles of low concentration (0.1 and 0.3 wt%) has been synthesized, with poly(ethylene terephthalate) (PET) as a rigid segment and poly(tetraoxymethylene) (PTMO) as the flexible segment at the ratio of 50 wt%. The filler was used in the form of suspension or solid powder. The dielectric spectroscopy results for these materials, in a wide range of frequencies and temperatures, are presented and compared with similar results for a pure polymeric matrix. Two relaxation processes, α and β, have been observed clearly in all samples at about 253 K and 163 K, respectively. The α process was shifted towards the lower temperatures as the nanoparticle content increased, while the β-relaxation was unaffected by the doping. The interfacial polarization effect was observed in the samples with nanoparticles, less pronounced for the larger nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 40â41, 1 November 2006, Pages 4279-4282
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 40â41, 1 November 2006, Pages 4279-4282
نویسندگان
J. Majszczyk, N. Guskos, J. Typek, V. Likodimos, M. Maryniak, Z. Roslaniec, M. Kwiatkowska, D. Petridis,