| 초록 |
Vegetable oil is readily regenerated via photosynthesis. Therefore, using inexpensive renewable vegetable oil has greatly attracted the attention of many researchers. In this work, the epoxidized castor oil (ECO)/clay nanocomposites were prepared by using ECO with ion-exchanged organoclay. The contents of oganoclay were varied with the 0, 1, 2, and 3 wt% and the N-benzylpyrazinium hexafluoroantimonate (BPH) was used as a cationic latent catalyst. The cure behaviors, glass transition temperature (Tg), and thermal stability factors of the nanocomposites were investigated by using dynamic differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and thermogravimetric analysis (TGA), respectively. As a result, the addition of 1-2 wt% organoclay was enough to improve the mechanical interfacial properties of the composites. This was probably due to the fact that the intercalation of the epoxy chains inside the organoclay gallery enhanced the interactions between the silicate layer and the epoxy chains.
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