Study of compatibility, morphology structure and mechanical properties of CPVC/ABS blends

Compatibility, morphology structure, and mechanical properties of CPVC/ABS (Chlorinated polyvinyl chloride/acrylonitrile-butadiene-styrene) blends were studied. The core-shell ratios of ABS were set at 40/60 and 70/30. The interface interactions between ABS and CPVC were changed by modifying the acrylonitrile (AN) content of the shell. The compatibility of CPVC with the shell of ABS was studied by the blends of CPVC/SAN with different AN content in SAN. Dynamic mechanical analysis results of CPVC/SAN were in accordance with the morphological properties of CPVC/ABS. The mechanical properties of CPVC/ABS blends in which the polybutadiene content was set to 15 wt % To were studied. Results showed, with the change of AN content, the impact strength followed different way for CPVC/ABS blends with different core-shell ratios of ABS because of the influence of the compatibility. When the core-shell ratio was 40/60, the CPVC/ABS blends were much ductile in more widely AN range than the blends, whereas the core-shell ratio of ABS was 70/30. The differences also showed in the SEM micrographs by the investigation of toughening mechanism. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 116: 3448-3454, 2010