Title: PREPARATION AND CHARACTERISATION OF EPOXY COMPOSITES FILLED WITH SILICA NANOPARTICLES
Page Range: p.465-469
Author(s): Cheng-Fang Ou; Ming-Chin Shiu
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 16
Issue No: No.7
Abstract
A series of epoxy-silica composites containing 0.5, 1, 3, 5 or 7 wt% of silica nanoparticles were prepared by solution blending. Differential scanning calorimetric studies showed that the glass-transition temperatures of the composites were higher than that of the pure epoxy, and that they increased with increasing silica content. The decomposition temperatures the composites were also higher than that of the pure epoxy, a maximum increase of 20.8 deg.C being achieved in the presence of 5 wt% of silica. The light transmittance of all the composites was more 80%. The permeability of the composites to water decreased with increasing silica content, and the decrease in permeability reached a maximum value of 56.3% at 7 wt% of silica. Scanning electron microscopy studies showed that fine particles of silica were dispersed without agglomeration in the epoxy matrix. 25 refs.
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