Copolymerization of styrene. IV. Copolymerization with esters of benzylidenecyanoacetic acid

Styrene was copolymerized in bulk with a number of esters of benzylidenecyanoacetic acid. The kinetic scheme of all pairs fitted the improved scheme of copolymerization, taking into account the effect of the penultimate unit. The Alfrey‐Price Q and e values were calculated. Using the modified Taft e...

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Bibliographic Details
Published in:Journal of applied polymer science 1970-06, Vol.14 (6), p.1491-1505
Main Authors: Gilath, Arie, Ronel, Samuel H., Shmueli, Mirjam, Kohn, David H.
Format: Article
Language:English
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Summary:Styrene was copolymerized in bulk with a number of esters of benzylidenecyanoacetic acid. The kinetic scheme of all pairs fitted the improved scheme of copolymerization, taking into account the effect of the penultimate unit. The Alfrey‐Price Q and e values were calculated. Using the modified Taft equation, log (1/r1) = ρ*σ* + δEs, it was found that the relative reactivities of the ester monomers toward the polystyryl radical were correlated by the polar substituent constants σ* of the ester alkyl groups (ρ* = 0.14) and not by their steric substituent constants Es (δ = 0.008).
ISSN:0021-8995
1097-4628
DOI:10.1002/app.1970.070140607