Simulation of Primary Particle Stability in VC Suspension Polymerization

In this study the electrostaticstability of PVC primary particles formed in suspension polymerization of VCM is simulated. In absence of secondary suspending agents, the primary particles are stabilize through their own small negative electrostatic charge formed from the chain transfer radical reaction into the polymer chains or from dehydrochlorination reaction .Also, evolution of two terms of aggregation kernel and stability ratio of primary particle, which depend on Ionic strength of polymerization media, temperature and charge density, with particle size is investigated. The simulation results show that particle agglomeration most readily occurs between small-small and large-small particles. It can be seen that aggregation kernel and the inverse of stability ratio increases with temperature and the reciprocal Debye length.