In VDC-AN suspension copolymerization

the effect of water solubility of AN on composition of both the monomers and the copolymer was studied.The results showed that the composition of the copolymers was significantly different from the bulk model prediction

because AN was partially water soluble and it decreased the AN content in organic phase.In this work for exact calculation of the composition of VDC-AN copolymer

it was supposed that transfers of the dissolved AN to the organic phase were much faster than polymerization

and AN phase partition in VDC/water system was nearly balanceable.The Marker formula describing AN phase partition between VDC and water was used in the correction of AN content in organic phase

and then the composition of VDC-AN copolymers was calculated with the Mayo-Lewis formula using the reactivity ratio values from the bulk polymerization literature.It was found that the calculated data agree with the experimental results.