مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

The cure reaction for a system of o-cresol-formaldehyde epoxy resin (o-CFER), with 3-methyl-tetrahydrophthalic anhydride (MeTHPA), N,N-dimethyl-benzylamine, and organic montmorillonite (org-MMT), as a curing reagent, an accelerator and an additive, respectively, was investigated by means of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The XRD result indicates that an exfoliated nanocomposite was obtained. The curing kinetic data of o-CFER/MeTHPA and o-CFER/MeTHPAlorg-MMT nanocomposites were obtained by non-isothermal differential scanning calorimetry. The nanocomposite has a slightly higher average value of activation energy than that of pure o-CFER due to the epoxy resins chains are inserted into the galleries of montmorillonite and the movement and diffusion of reactive groups are hindered. The curing kinetics analysis was performed by the isoconversional methods of Ozawa, Friedman, and Kissinger-Akahira-Sunose. The results showed that the Ozawa method is the best of the three models studied.