Stella F. G. Camargo and Ana M. F. Fileti
Polymerization, High solid content, Aspen Polymers®, Polymers Properties
In order to obtain latexes with high solids content, simulations of a styrene-butadiene emulsion copolymerization were carried out, in semi-continuous process, using the Aspen Polymers® software. The solid content in the styrene-butadiene emulsion was increased gradually reducing the water of the formulation and maintaining the proportionality between the other raw materials, ranging from the original 48.4% to 65.1%. The final properties of the emulsion had expected results, as discussed on theoretical basis: the density, viscosity, molecular weight and particle diameter enlarged with the increasing of solid content. The polydispersity, the glass transition temperature, the specific heat and the thermal conductivity decreased. A butadiene conversion of 99% and a reaction yield of about 97% were reached using 60% of solids content, so that this was considered the best adjusted operating point.