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Synthesis of phenol‐terminated polyisobutylene: Competitive chain transfer reactions
Author(s) -
Rooney J. M.
Publication year - 1980
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1980.070250710
Subject(s) - isobutylene , phenol , polymerization , polymer chemistry , chemistry , chain transfer , polymer , heptane , methylene , cationic polymerization , alkyl , organic chemistry , radical polymerization , copolymer
Polymerization of isobutylene initiated by either aluminum trichloride or tin tetrachloride were conducted in the presence of alkyl phenols in both n ‐heptane and methylene dichloride solutions at temperatures between −10 and −70°C. The resultant polymers contained both unsaturated and phenolic endgroups in varying proportions dependent upon reaction conditions. Increased phenol concentrations in the polymerization medium resulted in decreased polymer molecular weights and increased phenol endgroup content. Increased reaction temperature reduced polymer molecular weights and phenol endgroup content. Chain lengths governed by ring alkylation were found to be less sensitive to polymerization temperature than those determined by other modes of chain transfer.