Solvent effects on the copolymerization of styrene with maleic anhydride: determination of apparent reactivity ratios from the penultimate unit model

B. Klumperman, G. Vonk

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Abstract

A method for optimization of monomer feed compn. to obtain the most accurate reactivity ratios was described by Tidwell and Mortimer. The proposed method is more generally applicable for use with the Mayo-Lewis model and copolymer compn. vs monomer feed compn. data. By means of a simulated example involving the penultimate unit models, the effect of exptl. design in the detn. of reactivity ratios is clearly demonstrated. The same technique is adapted to the copolymn. of styrene with maleic anhydride. Apparent reactivity ratios are obtained for polymn. in PhMe, butanone and DMF. There appears to be a significant solvent effect. The highest obtainable accuracy of apparent reactivity ratios depends on the values of the reactivity ratios themselves. Interpretation of the exptl. results in terms of the bootstrap model leads to the conclusion that there is no dependence of monomer sequence distribution vs copolymer compn. on the solvent. Quant. interpretation is hampered most probably by the absence of maleic anhydride homopolymn.
Original languageEnglish
Pages (from-to)955-960
JournalEuropean Polymer Journal
Volume30
Issue number8
DOIs
Publication statusPublished - 1994

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