Self-Compatibilization of poly(butyl methacrylate)/acrylonitrile-co-styrene blends via concentrated emulsion polymerization

✍ Scribed by Hangquan Li; Eli Ruckenstein

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 952 KB
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960926)61:13<2285::aid-app7>3.0.co;2-8

✦ Synopsis

Two concentrated emulsions in water were prepared one from weakly polymerized butyl methacrylate (BMA) and the other one from a weakly polymerized mixture of acrylonitrile (AN) and styrene (St). Each of the concentrated emulsions also contained a small amount of a vinyl-terminated macromonomer (VTM). After the concentrated emulsions were partially polymerized, they were mixed and subjected to complete polymerization. This generated a blend of poly(buty1 methacrylate) (PBMA), binary copolymer AN-co-St (AN-St.), and networks containing chains of VTM and those formed from different monomers. The networks constitute compatibilizers between the PBMA and AN-St. Such a preparation method, in which the components and compatibilizer are generated simultaneously, was called self-compatibilization. The blend possesses excellent tensile properties and toughness compared with the ternary copolymer AN-St-BMA and with the solution blends of PBMA/ AN-St. The generation of the compatibilizers and the compatibilization mechanism were investigated via kinetic studies. The effects of the VTM, polymerization conditions, and the weight ratio of AN/St were also examined.