Free-radical copolymerizations of vinylbenzyl-terminated polystyrene (PS–VM; M1) and maleate-terminated poly(ethylene glycol methyl ether) PEG–MM; M2) were carried out in benzene. Mixtures of the PEG–MM and PS–VM showed phase separation during copolymerization. The copolymerization reactivity was estimated from the distribution functions by gel permeation chromatography of the comb-shaped copolymers produced. The reactivity ratios (r1 0.765 and r2 0.064) obtained for the binary macromonomer system were different from corresponding model systems of styrene and maleic acid ethyl ester (r1 0.13 and r2 0.035) due to phase separation.
Посилання на статтю:
Polymer Communication Radical copolymerization reactivity of maleate-terminated poly(ethylene glycol) with vinylbenzyl-terminated polystyrene macromonomers / Koji Ishizu, Xiao Xiang Shen // Polymer. – 1999. – N 40. – P. 3251–3254.