Dispersion copolymerization of methyl methacrylate and styrene in supercritical carbon dioxide

作者：Timashev P S^*; Krotova L I; Lemenovskii D A; Popov V K

来源：Russian Journal of Physical Chemistry B, 2010, 4(7): 1158-1163.

DOI：10.1134/S199079311007016X

• supercritical carbon dioxide
• methyl methacrylate
• styrene
• copolymers
• polymer nanocomposites

A method for producing finely dispersed powders of methyl methacrylate (MMA)-styrene copolymer by radical polymerization in a supercritical carbon dioxide medium (SC-CO(2)) was proposed, studied, and experimentally implemented. The dispersing agent (surfactant), which made it possible to obtain nearly monodisperse size distribution of polymer particles, was poly(dimethylsiloxane methacrylate), a SC-CO(2)-soluble substance. The copolymer, synthesized with a molecular mass of M (w) similar to 36000 in the form of spherical particles with a characteristic size of similar to 1 mu m, exhibited a higher thermal stability as compared to poly(methyl methacrylate) with a similar molecular mass. Varying the percentage ratio between MMA and styrene monomers, it was possible effectively control the integral hydrophobicity and physicomechanical characteristics of the methacrylate-styrene copolymer.

• 出版日期2010-12