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The anionic polymerization of styrene in hexamethylphosphortriamide (HMPA) with sodium as gegenion

✍ Scribed by L.L. Böhm; G.V. Schulz

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 362 KB
Volume: 11
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(75)90074-9

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✦ Synopsis

The anionic polymerization of st wene with sodium as gegenion was investigated in hexamethylphosphortriamide by the flow technique. The pol3merization process corresponds to that observed in other polar solvents with the difference that in this solvent polystyrylsodium prevailingly exists as solventseparated ion pairs and its free ions. Therefore the rate constants of these species can be directly determined and are found to be practically identical to those found in other ethereal solvents. The dissociation constant of polystyrylsodium is approximately 10--' mole/1.

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