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Cationic ring‐opening polymerization of lactones in the presence of alcohol
Author(s) -
Okamoto Yoshihisa
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910420109
Subject(s) - cationic polymerization , polymerization , ring (chemistry) , alcohol , ring opening polymerization , polymer chemistry , chemistry , materials science , organic chemistry , polymer
Cationic ring‐opening polymerization of e‐caprolactone using triethyloxonium hexafluorophosphate initiator in the presence of alcohol to produce low molecular weight polyester glycol was examined. The polymerization proceeded by an activated monomer mechanism; thus the polymer molecular weight increased directly with the monomer conversion. Polymerization of lactones other than ϵ‐caprolactone were also examined, and the overall rate of polymerization was in the order δ‐valerolactone> ϵ‐caprolactone>> β‐butyrolactone> diketene> γ‐butyrolactone.