کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5191324 | 1381230 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel cross-linked polyimide film: synthesis and dielectric properties
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel cross-linked polyimide (CPI) has been prepared by imidization of cross-linked poly(amic acid) (CPAA). In this work, the Ac conductivity and dielectric properties of this polyimide are presented comparitively with those of conventional polyimide (PI), in the 0.2-100Â kHz frequency range and 300-463Â K temperature interval. Although the frequency and temperature dependencies of dielectric constant of both conventional and cross-linked polyimides show the same behaviour, the dielectric constant of CPI takes lower values. The Ac conduction studies suggest that electron hopping is responsible for conduction of the PI and CPI films. The activation energy calculated in 296-353Â K temperature interval and the Ã-relaxation was also observed for CPI.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 11, 11 May 2005, Pages 3720-3729
Journal: Polymer - Volume 46, Issue 11, 11 May 2005, Pages 3720-3729
نویسندگان
Hüseyin Deligöz, Saadet ÃzgümüÅ, Tuncer Yalçınyuva, Saffet Yıldırım, Deniz Deǧer, Kemel UlutaÅ,