Styrene/methyl methacrylate S/MMA

Blends of polycarbonate with other styrenic resins are relatively new and therefore their current market volume is low. They have been developed primarily to upgrade the performance of such styrenic resins as styrenic-maleic anhydride (SMA), styrene-methyl methacrylate (S-MMA), acrylic-sty-rene-acylonitrile (ASA) resins primarily for impact strength and to some extent for DTUL improvement (Tables 15.7, 15.8 and 15.23). These blends uniquely combine high notched Izod impact strengths (ranging from 500 J/m to > 1000 J/m) with better UV resistance or weatherability than ABS. 

Blends of polycarlxmate with other specialty styrenic resins such as styrene-maleic anhydride (SMA), styrene-methyl methacrylate (S-MMA) resins were investigated primarily to upgrade the performance of these styrenic resins with regard to then-impact strength and to some extent DTUL improvement. A developmental SMA/PC blend (former Arloy , Arco) contained SMA grafted with polybutadiene as the impact modifier. The properties of SMA/PC blend were similar to ABS/PC blend with comparable impact strength (>500 J/m). However, it was discontinued... 

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