Abstract
Polymerization of methyl methacrylate (MMA) in chloroform (CF), ethyl acetate (EA), and iso-amyl acetate (iAA) with compressed CO 2 as antisolvent has been carried out at 333.2 K and different monomer concentrations. The results show that at the low monomer concentration (1 mol l −1) the addition of the antisolvent CO 2 reduces the yield and the molecular weight of the poly(methyl methacrylate) (PMMA). At the higher monomer concentration (4 mol l −1) the yield decreases initially, and then increases with the increase of CO 2 pressure or the volume expansion ratio (VER) of the solution. The molecular weight and the molecular weight distribution of the products also vary with VER.
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