Correlation between impact strength and fracture surface fractal dimension of ABS filled with hollow glass beads

摘要

The hollow glass bead (HGB) filled poly(acrylonitrile-butadiene-styrene) copolymer (ABS) composites were prepared by means of a twin-screw extruder. The HGB surface of was treated using a silane coupling agent, and the filler volume fraction was range from 0 to 15%. The impact strength (σ_I) of the ABS/HGB composites was measured at room temperature. On the basis of the impact fracture surface SEM photograph, the impact fracture surface fractal dimension (D_s) of the composites was measured, respectively, by means of the pixel-covering method and projective- covering method and an image processing software, to investigate the relationship between the D_s and σ_I of the composites. The results showed that the σ_I was related closely to D_s: σ_I increased with an increase of D_s, and the relationship between them could be described by an exponential function. Furthermore, the Ds measured by the pixel-covering method were from 1.6232 to 1.7313, while those measured by the projective-covering method were from 2.5174 to 2.5752.