Cure kinetics of epoxy/MWCNTs nanocomposites: Isothermal calorimetric and rheological analyses
عرض / فتح
التاريخ
2017المؤلف
Vijayan, PoornimaPuglia, Debora
Rastin, Hadi
Saeb, Mohammad Reza
Shojae, Behrouzi
Formelaf, Krzysztof
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البيانات الوصفية
عرض كامل للتسجيلةالملخص
A combinatorial route has been applied in cure kinetics study of epoxy nanocomposites containing multi-walled carbon nanotubes (MWCNTs) based on differential scanning calorimetry and rheokinetic analyses under isothermal conditions. Pristine and amine-modified MWCNTs bearing primary and secondary amines were used at very low concentrations (0.1 and 0.3wt.% based on epoxy weight). Model-free and model-fitting methods were applied on calorimetric data, and Kamal autocatalytic model revealed good agreement with the experimental data. In case of epoxy filled with amine-modified MWCNTs, activation energy took a value lower than that obtained for sample containing pristine MWCNTs at an identical loading because of less hindrance brought about by curing. Isothermal rheokinetic studies supported formation of a filler network during processing, which hindered epoxy-anhydride cure reaction at higher MWCNTs loadings leading to a highly crosslinked epoxy network.
المجموعات
- الأبحاث [1454 items ]