| 초록 |
In this work, the effect of zeolite conditions on the cure kinetics and thermal stabilities of zeolite/diglycidylether of bisphenol A (DGEBA) nanocomposites was investigated. The zeolites were treated by 1 N HCl or KOH solution for 24 h and their changes of surface characteristics were studied in X-ray photoelectron spectroscopy (XPS). Cure kinetics and thermal stabilities of the composites were examined in the context of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively. From the results, the Si/Al composition ratio of the treated zeolites was increased in the zeolite framework, which was due to the de-alumination of the zeolites. The cure activation energy of the treated zeolite/DGEBA composites was lower than that of neat zeolite/DGEBA ones, while the decomposition activation energy of the treated composites was increased. The results indicated that the surface treatments of zeolites made a major role to influence on the cure reactions between the zeolite surfaces and the basic epoxy resins in the composites.
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