Solution of population balance equations for prediction of particle size distribution in emulsion polymerization: comparison and evaluation of different numerical methods.

摘要

The quantitative description of the development of latex particle size distribution (PSD) in emulsion polymerization reactors is very complex. Important process variables, such as type and concentration of initiator and surfactants, polymerization temperature, and variation of the physical properties of the latex during the polymerization, have been included in a recent mathematical model for predicting the evolution of particle size distribution in emulsion polymerization reactors (Kiparissides et al. 2000). The formation of particle nuclei can occur by both homogeneous and micellar nucleation mechanisms (Gilbert, 1995). The nucleated particles can subsequently increase in size either by growth due to polymerization or/and coagulation with other particles. The combined action of nucleation, growth, and aggregation determine the evolution of the latex particle size distribution PSD (Feeney et al. 1984). The evolution of the latex PSD is further complicated due to the strong coupling between reaction kinetics and particle size during emulsion polymerization.