Production of polymethylmethacrylate particles by dispersion polymerization in aqueous media with ceric ammonium nitrate

✍ Scribed by Volga Bulmuş; Ali Tuncel; Erhan Pişkin

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 699 KB
• Volume: 60
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960502)60:5<697::aid-app6>3.0.co;2-l

✦ Synopsis

Polymethylmethacrylate particles with narrow size distributions with different sizes in the range of 1.25-4.58 pm were produced by dispersion polymerization of methylmethacrylate (MMA) in ethanol/water media, by using 2,2'-azobisisobutyronitrile (AIBN) (as an initiator), (PVP) poly(viny1 pyrrolidone) (as a stabilizer), and ceric ammonium nitrate (CAN) (as a coinitiator and also as a costabilizer). Particle size was increased by increasing the initiator concentration and the ethanol : water ratio, and by decreasing the monomer : dispersion medium ratio and the PVP and CAN concentrations. The addition of CAN in the recipe of the MMA polymerization improved the monodispersity, and also increased the monomer conversion rate.