Synthesis of core-shell latexes of casein-g-poly(methyl methacrylate) was achieved through the graft copolymerization of methyl methacrylate onto the casein in the presence of trace copper ions. It was observed that the concentration of MMA, casein, and the ratio of MMA to casein had a prominent effect on the final conversion and graft ratio, while the concentration of copper(II) ion almost had no effect. The graft polymerization was much slower at 60°C than at 70°C. Further increase of reaction temperature from 70°C to 80°C enhanced only the initial conversion. Kinetic study of the graft copolymerization at 70°C indicated that the reaction proceeded through two stages which were typical kinetic behavior for the radical polymerization confined in a pre-formed micro-environment. Finally, the particle size of the casein-g-PMMA latexes decreased with the increase of percent grafting, and an almost linear relationship between the particle size and the percent grafting was evident.
|Number of pages||2|
|Journal||American Chemical Society, Polymer Preprints, Division of Polymer Chemistry|
|Publication status||Published - 1 Aug 1998|
|Event||Proceedings of the 1997 Boston Meeting - Boston, MA, United States|
Duration: 23 Aug 1998 → 27 Aug 1998
ASJC Scopus subject areas
- Polymers and Plastics