Fundamental Studies on the Preparation of Plasticized Synthetic Resin Latices

II. Influence of the Plasticizer Added in the Layer Polymerization of Methyl Methacrylate to the Rate of Conversion

Abstract

The mix of methyl methacrylate and DBP was polymerized in the layer system. It was shown that there were three types of conversion-DBPc urves for any given time duration: in M type the rate of conversion increased with increase of the amount of DBP to a certain point and then slowed down, in H type the rate of conversion was slightly dependent on the amount of DBP and in D type addition of DBP decreased the rate of conversion. The concentration of DBP in polymer particle was extremely lower than in methyl methacrylate- DBP oil phase. When DOP was added instead of DBP, the conversion-DOP curve was D type and DOP was not contained appreciably in polymer particle.