کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
674405 1459561 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal degradation behavior and kinetics of polybenzoxazine based on bisphenol-S and aniline
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermal degradation behavior and kinetics of polybenzoxazine based on bisphenol-S and aniline
چکیده انگلیسی

The thermal degradation behavior of polybenzoxazine based on bisphenol-S/aniline was studied by Fourier transform infrared spectroscopy, thermogravimetry–mass spectrometry, thermogravimetry, and differential thermal analysis. The degradation reaction begins with the detachment of Schiff base, then the scission of aromatic C–S bond, followed by the cleavage of Mannich bridge structure. The scission pathways of the aromatic C–S bond in argon and air are similar, while the degradation pathways of the Mannich bridge structure in both atmospheres are different. The degradation of PBS-a shows two weight loss stages in nitrogen and air, respectively, and the kinetic parameters of the degradation in the first stage were obtained with Flynn–Wall–Ozawa and Coats–Redfern methods. The most probable kinetic mechanism function is a three-dimensional diffusion model in the initial stage in both nitrogen and air.


► The thermal degradation of PBS-a begins with the detachment of Schiff base.
► The starting cleavage temperature of Ar–S bond is lower than that of Mannich bridge.
► The scission pathways of the Ar–S bond in argon and air are similar.
► The degradation pathways of the Mannich bridge in argon and air are different.
► The degradation of PBS-a shows two weight loss stages in nitrogen and air.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 523, Issues 1–2, 20 August 2011, Pages 170–175
نویسندگان
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