Free radical copolymerization: an NMR investigation of current kinetic models

I.A. Maxwell, A.M. Aerdts, A.L. German

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Abstract

The ability of terminal model kinetics to predict copolymer microstructure was tested for the styrene-Me methacrylate system copolymd. at 40 Deg at various fractions of monomers. 13C NMR studies (in the accompanying paper) showed that previous peak assignments of statistical styrene-Me methacrylate copolymers were incorrect. The peak areas obtained for all copolymers were described in terms of triad sequences and were also adequately predicted by the terminal model utilizing reactivity ratios calcd. from a nonlinear least squares fit to the copolymer compn. data detd. by 1H NMR spectra. The nonterminal model behavior of the kinetics of polymn. described elsewhere could be successfully modeled by the restricted penultimate model of T. Fukuda et al (1985, 1987). All current data could also be explained by various bootstrap or monomer-polymer complex models
Original languageEnglish
Pages (from-to)1956-1964
JournalMacromolecules
Volume26
Issue number8
DOIs
Publication statusPublished - 1993

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