engleski

Isothermal and Non-Isothermal Cure Kinetics of an Epoxy / Poly(oxypropylene)diamine /Octadecylammonium Modified Montmorillonite System

The effect of an octadecylammonium exchanged montmorillonite (OMMT) on the curing kinetics of a thermoset system based on a bisphenol A epoxy resin and an poly(oxypropylene)diamine curing agent were studied by means of differential scanning calorimetry (DSC) in isothermal and dynamic (constant heating rate) conditions. Montmorillonite and prepared composites were characterized by X-ray diffraction analysis (XRD) and simultaneous differential scanning calorimetry - thermogravimetric analysis (DSC – TGA). Analysis of DSC data indicated that the intercalated octadecylammonium cations catalyze epoxy-amine polymerization. A kinetic model, arising from an autocatalyzed reaction mechanism, was applied to DSC data. Fairly good agreement between experimental and modeling data was obtained.

nanocomposites ; montmorillonite ; epoxy ; kinetics ; differential scanning calorimetry

Glavni autori: Marica Ivanković, Ivan Brnardić