Blends of bisphenol A polycarbonate and rubber-toughened styrene–maleic anhydride copolymers

✍ Scribed by H. A. Stretz; P. E. Cassidy; D. R. Paul

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 357 KB
• Volume: 74
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19991107)74:6<1508::aid-app24>3.0.co;2-5

✦ Synopsis

The morphology and mechanical properties of polycarbonate (PC) blends with rubber-toughened styrene-maleic anhydride copolymer materials (TSMA) were investigated and compared with the properties of blends of PC with acrylonitrilebutadiene-styrene (ABS) materials. The PC/TSMA blends showed similar composition dependence of properties as the comparable PC/ABS blends. Polycarbonate blends with TSMA exhibited higher notched Izod impact toughness than pure PC under sharpnotched conditions but the improvements are somewhat less than observed for similar blends with ABS. Since PC is known for its impact toughness except under sharpnotched conditions, this represents a significant advantage of the rubber-modified blends. PC blends with styrene-maleic anhydride copolymer (SMA) were compared to those with a styrene-acrylonitrile copolymer (SAN). The trends in blend morphology and mechanical properties were found to be qualitatively similar for the two types of copolymers. PC/SMA blends are nearly transparent or slightly pearlescent.