HIGH TEMPERATURE FREE-RADICAL COPOLYMERIZATION OF STYRENE AND METHYL METHACRYLATE IN SOLUTION WITH scCO_2

摘要

High-temperature styrene-methyl methacrylate copolymerizations in solution with 20wt% scCO_2 yielding low molecular weight polymers (M_n ～ 2500 g·mol~(-1)) were investigated and modeled considering the effect of depropagation. The simulations were carried out using the simulation package PREDICI. Since the targeted polymer have chain lengths well below 100, the influence of chain-length-dependent termination kinetics is considered for modeling. Additional phase-behavior calculations showed that the solution remains single-phase throughout the reaction.