Kinetics of the anionic polymerization of styrene in benzene. Effect of the alkali-metal counter-ion
- 1 January 1966
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 62, 701-706
- https://doi.org/10.1039/tf9666200701
Abstract
The propagation reaction in the anionic polymerization of styrene has been studied with the counter-ions, Na, K, Rb and Cs. In the range of active-centre concentration between 10–3 and 10–5M, with sodium the ion-pairs are entirely associated, with caesium the ion-pairs are not associated, while potassium shows intermediate behaviour. Absolute ion-pair propagation constants could be measured for polystyryl potassium, rubidium and caesium. The equilibrium constant for association of ion-pairs was determined for polystyryl potassium, together with the heat and entropy of association.Keywords
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