Production of Polystyrene Microparticles Using Nonisothermal Polymerization in Supercritical Carbon Dioxide

Precipitation copolymerization of methyl methacrylate/meth‐acrylate acid in supercritical carbon dioxide

“…Supercritical carbon dioxide (ScCO 2 ) has been well known as an environmentally friendly alternative to traditional solvents because of its non-toxic, inexpensive and natural abundance benefits. 1 ScCO 2 as the polymerizing medium, can be used to produce the polymers, such as homopolymer/copolymers, [2][3][4] cross-linked polymers, 5,6 porous hydrogel-materials, 7 et al In ScCO 2 system, the polymerization of the most monomers can avoid the chain transfer to the solvents, and it is the advantage to synthesizing the polymers with high molecular weight. 8 In addition, the residue solvent or monomer can be removed completely by the extraction using ScCO 2 as the extracting agent.…”