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Anionic polymerization of carbazolyl-substituted oxiranes initiated by potassium alkalide, potassium tert-butoxide and potassium hydride

✍ Scribed by Gintaras Buika; Juozas V. Gražulevičius; Andrzej Stolarzewicz; Zbigniew Grobelny

Book ID
118285094
Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
318 KB
Volume
196
Category
Article
ISSN
1022-1352

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## 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 hydrol

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The propagation rate constant, k , , was determined for the polymerization of (phenoxy-methy1)oxirane (2,3-epoxypropyl phenyl ether) initiated by potassium tert-butoxide in the presence of various crown ethers: 12-crown-4,15-crown-5,18-crown-6, dicyclohexano-l8-crown-6, dicyclohexano-24-crown-8, dib

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The influence of the crown ether concentration on the reaction rate constants and the equilibrium constant in anionic (butoxymethy1)oxirane polymerization was studied. Polymerizations of (phenoxymethy1)oxirane and (2-(9-~arbazoyl)ethoxymethyl)oxirane were carried out for the sake of comparison. The

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## Abstract The anionic polymerization of 2‐oxetanone and 4‐methyl‐2‐oxetanone initiated with the potassium hydride/18‐crown‐6 complex was investigated. The α‐proton abstraction of the monomer was found to proceed at the initiation step of this polymerization. The salt of the unsaturated carboxylic