Abstract

In this work the BuA backbiting and its kp-gel effect is included in a previous published model for the simulation of the emulsion terpolymerization of St MMA BuA It is then possible to evaluate the branching of this terpolymer and the average diffusion of the monomers polymers and polymer radicals The diffusion is evaluated through the propagation and termination coefficients with a modification of the Schmoluchowski equation On the other hand it is also found that the BuA propagation coefficient depends on the fraction of BuA free volume XVf BuA in the terpolymer and that the kind of model suitable for the simulation of the kp-gel effect is determined by the rate of polymerization Rp the number of radicals in the particle per mol of monomers R n and the total diffusion of the polymer radicals in the particle nT DPR