Kinetic studies of aqueous polymerization of acrylic acid initiated using potassium bromate/sodium metabisulphite redox pair

✍ Scribed by Liu, Zuifang; Brooks, Brian W.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 223 KB
• Volume: 45
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199802)45:2<217::aid-pi927>3.0.co;2-q

✦ Synopsis

Aqueous polymerization of acrylic acid was conducted using potassium bromate/sodium metabisulphite redox initiators under isothermal conditions. The initial polymerization rates were determined with variation in temperature and in the initial concentrations of acrylic acid, potassium bromate and sodium metabisulphite. The e †ect of pH on polymerization was also investigated. An overall activation energy of 28É62 kJ mol~1 was obtained over the temperature range 13È43¡C. The polymerization is initiated by free radicals and terminated by a combination of monomolecular and bimolecular modes. The cage e †ect and chain transfer to bisulphite anion are probably both signiÐcant.