کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
675478 1459622 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic thermogravimetric degradation of gamma radiolytically synthesized Ag–PVA nanocomposites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Dynamic thermogravimetric degradation of gamma radiolytically synthesized Ag–PVA nanocomposites
چکیده انگلیسی

The degradation kinetics of gamma radiolytically synthesized Ag–PVA nanocomposites was investigated by thermogravimetric method under dynamic conditions (30–600 °C) in an inert atmosphere. Thermogravimetric analysis showed that thermal degradation of composites was a two-stage process for the lower amount of nanofiller and single-stage for the higher amount of nanofiller. The Vyazovkin model-free kinetics method was applied to calculate the activation energy (Ea) of the degradation process as a function of conversion and temperature. At a given degradation temperature, PVA as a host in nanocomposite presents lower reaction velocity, while its Ea is higher than that of pure PVA.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 460, Issues 1–2, 25 August 2007, Pages 28–34
نویسندگان
, , , ,