کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
674069 1459538 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study on the effect of aminosilane functionalized nanoclay on the curing kinetics of epoxy nanocomposites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Study on the effect of aminosilane functionalized nanoclay on the curing kinetics of epoxy nanocomposites
چکیده انگلیسی

The curing kinetics of epoxy nanocomposites prepared by incorporating pristine (P-MMT) and functionalized montmorillonite clay (S-MMT) was studied using non-isothermal differential scanning calorimetry (DSC) experiments. Loading of S-MMT in epoxy matrix resulted in the decrease of peak exotherm temperature (Tp) at all heating rates corroborating the enhanced curing reactions, when compared to neat or P-MMT filled epoxy system. The kinetic parameters of the curing processes of the neat, pristine and functionalized MMT filled epoxy were determined using isoconversional methods viz. Kissinger and Friedman methods. In comparison to P-MMT filled epoxy system, epoxy nanocomposites loaded with S-MMT showed lower activation energy (Eα) over the range of conversion (α) revealing the enhanced curing reactions in these system. Besides Eα, the overall order of reactions (m + n) does not vary significantly in comparison to neat or P-MMT loaded epoxy corroborating the fact that the curing mechanism is autocatalytic in nature. The predicted curves determined using the kinetic parameters fit well with the non-isothermal DSC thermograms revealing the proposed kinetic equation clearly explain the curing kinetics of the prepared epoxy nanocomposites.


► Epoxy nanocomposite based on pristine and silane functionalized MMT were prepared.
► Non-isothermal DSC was used to study the curing kinetics of the epoxy nanocomposite.
► Peak temperature (Tp) of epoxy curing reaction decreases on loading P-MMT or S-MMT.
► Kinetic analysis of these epoxy nanocomposites revealed the autocatalytic nature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 546, 20 October 2012, Pages 16–23
نویسندگان
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