Terpolymerization of 2-ethoxy ethylmethacrylate, styrene and maleic anhydride: determination of the reactivity ratios

[摘要] Terpolymerization of 2-ethoxyethyl methacrylate (2-EOEMA), styrene (St) and maleic anhydride (Ma) initiated by benzoyl peroxide was carried out in acetone as common solvent for three monomers. The structure and composition of terpolymer were determined by FTIR spectroscopy by recording analytical absorption bands for St (3002 cm^-1), Ma (1781 cm^-1) and 2-EOEMA (1261 cm^-1) units, respectively. The reactivity ratios for the monomers were calculated according to the general copolymerization equations following the Finnemannâ€�?�Ross and Kelenâ€�?�Tudos models. The results show that terpolymerization were carried out through primary ``complex" mechanism at near-binary copolymerization of [St...Ma] complex with 2-EOEMA. Structure of the resulting terpolymer illustrated by ¹H-NMR and differential scanning calorimeter showed reduction in ð‘�??_g value.

[学科分类] 材料工程

[关键词] Terpolymerization;2-ethoxyethyl methacrylate;reactivity ratio.