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Potassium hydride — the new initiator for anionic polymerization of oxiranes

✍ Scribed by Andrzej Stolarzewicz; Dorota Neugebauer; Janusz Grobelny

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
352 KB
Volume
17
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Potassium hydride with 1,4,7,10,13,16‐hexaoxacyclooctadecane (18‐crown‐6) was used in the anionic polymerization of (butoxymethyl)oxirane. Polymers with low ratio of mass‐ to number‐average molar masses (M̄~w~/M̄~n~ < 1.1) were obtained, each macromolecule being terminated (after hydrolysis) with a hydroxyl group on both of its ends. Chain transfer reactions to the monomer were not observed to operate in this system.

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## Abstract **Summary:** A new generation of anionic initiators (butyllithium free), based on trialkylaluminum and a readily available alkali metal hydride, has been developed for the control of styrene polymerization at high temperature. Triisobutylaluminum and sodium hydride form heterocomplexes