Abstract
AbstractThe effects of maleic anhydride‐grafted styrene‐ethylene‐butylene‐styrene copolymer (SEBS‐g‐MAH) on the mechanical and morphological properties of polypropylene (PP) and poly(acrylonitrile‐butadiene‐styrene) (ABS) blends were investigated. Based on mechanical properties, including impact and tensile strengths, the PP/ABS (70/30) blends containing SEBS‐g‐MAH showed improved impact strength with minimal loss of tensile strength. As determined from morphological studies of the PP/ABS blends, addition of SEBS‐g‐MAH decreased PP/ABS blend droplet size more than the addition of SEBS. Additionally, the effects of SEBS‐g‐MAH and SEBS on the mechanical and morphological properties of the PP/ABS (70/30) blends were investigated during accelerated aging in an oven at 90°C for 72 h (one cycle). The impact strength of the PP/ABS (70/30) blends with SEBS‐g‐MAH (7 phr) decreased less than 10% after five cycles, but blends with SEBS (7 phr) and blends without compatibilizer decreased as much as 37%. The tensile strengths of the PP/ABS (70/30) blends after accelerated aging indicated a trend similar to that of the impact strength. The morphological studies indicated no significant changes in the PP/ABS (70/30) blends with SEBS‐g‐MAH; however, many cavities and damages were observed in the blend with SEBS. The above results suggest that SEBS‐g‐MAH acts as an impact modifier and as a good compatibilizer in the PP/ABS (70/30) blends. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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