Study on the Synthesis, Characterization, and Kinetic of Bulk Polymerization of Disproportionated Rosin (β-Acryloxyl Ethyl) Ester

Disproportionated rosin ((beta-acryloxyl ethyl) ester (DR-2-HEA) was synthesized by esterification of dispoportionated rosin (DR) with 2-hydroxyethyl acrylate (2HEA) and evaluated by FTIR spectroscopy, GC/MS, C-13-NMR spectroscopy. Kinetics parameters of bulk polymerization of DR-2-HEA in the presence of initiator ATBN was studied by using DSC. It has been assumed that the process of polymerization obey nth order empirical kinetic model to evaluate the kinetic parameters. The relative molecular weight and glass transition temperature of polymer of DR-2-HEA at different temperature was measured by GPC and DSC, respectively. The results showed that the temperature had no significant effect on the enthalpy of polymerization and the velocity of polymerization increased by the increase of temperature. DSC experimental data fit the simulation well while the reacted fraction (a) in the interval of 0.4<1. The polymer of DR-2-HEA is oligomer. The molecular weight and T-g did not affect by polymerization temperature. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 3757-3765, 2009