Vinylester resin matrix composites were fabricated with 1, 3, 5 and 10 wt.-% loadings of organoclay. The composite samples were subjected to various characterization techniques like X-ray diffraction, flexural testing, dynamic mechanical analysis, thermogravimetric analysis, and scanning electron microscopy. The clay samples as well as the clay-resin composites were investigated by X-ray diffraction. From the shift in the peak positions and the change in d-spacing values, it was evident that there was intercalation in the 10 wt.-% composites, whereas exfoliation occurred in the 1, 3, and 5 wt.-% composites. The flexural strength and the breaking energy of all the composites were decreased compared with the unfilled resin, but there was an increase in flexural modulus value by 13%. From the dynamic mechanical analysis of the 3 and the 5 wt.-% composites, it was observed that the loss modulus value was higher in the 3 wt.-% composites, but the glass transition temperature was slightly higher in the 5 wt.-% composites. Thermal degradation behavior was also improved in the 5 wt.-% composites compared with the 3 wt.-% composites.
- dynamic mechanical analysis
- polymer/clay nanocomposites
- thermogravimetric analysis (TGA)
- SILICATE NANOCOMPOSITES
- CLAY EXFOLIATION