کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5201136 1502884 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of thermal treatment time on structural and physical properties of polyimide films at beginning of carbonization
ترجمه فارسی عنوان
تأثیر زمان حرارتی بر خواص ساختاری و فیزیکی فیلمهای پلی آمید در آغاز کربنیزاسیون
کلمات کلیدی
پلییمید، مشتقات غنی از کربن، تخریب حرارتی، بازسازی سازه،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Poly(4,4′-oxydiphenylene-oxydiphthalimide) (POO) was thermally treated at 773 K for 1, 15 and 60 min under argon atmosphere resulting in free-standing films with intermingled characteristics between polymer and carbon-rich derivatives. Degradative thermal analysis performed by pyrolysis-gas chromatography/mass spectroscopy (Py-GC/MS) revealed CO2 among the major products of thermal decomposition which according to electron paramagnetic resonance (EPR) passed through a radical process. X-ray diffraction (XRD) revealed thermal treated samples with semicrystalline organization that was attributed to the development of lamellae structure. Moreover, Atomic force microscopy (AFM) showed an increase in the roughness of the samples that acquired pronounced roughcast-like surface. Hence, there was an enhancement of mechanical strength and dielectric permittivity. From the data collected a mechanism of thermal decomposition was proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 129, July 2016, Pages 399-407
نویسندگان
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