Title: TENSILE AND IMPACT PERFORMANCE OF POLYPROPYLENE MICROCOMPOSITE SYSTEM: EFFECT OF NOVEL SILICA ASH FILLER
Page Range: p.627-35
Author(s): Chaudhary D S; Jollands M C
File size: 120K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 6
Abstract
Polypropylene was used as the matrix with which to study filler-polymer interactions when rice hull ash (silica ash) was used as a microfiller. Two sizes of silica ash particles were studied to obtain quantitative data on the composites’ mechanical performance. Nucleating effects were found, suggesting, it is claimed, that there was a moderate polymer-filler interaction during melt-processing. A comparison of the effects of increasing filler loading and increasing surface treatment indicated, that at higher filler loadings, the effect of surface treatment was not dominant. Reducing the filler particle size was found to improve the tensile modulus and impact strength. Furthermore, removal of silica ash impurity by burning it off resulted in a significant increase in these properties, but similar results were not obtained following surface treatment of the unburnt ash. Such results are claimed to indicate that there was a possible trade-off between using the silica ash without burning, thus saving on the cost of burning off the impurities, and using the ‘burnt’ ash and saving on the cost of surface modification. 17 refs.
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