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Anionic and pseudoanionic polymerization of ϵ‐caprolactone
Author(s) -
Duda Andrzej,
Penczek Stanislaw
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.19910420110
Subject(s) - polymerization , caprolactone , polymer chemistry , chemistry , chain propagation , aluminium , solvent , kinetic energy , solvent effects , chain termination , organic chemistry , radical polymerization , polymer , physics , quantum mechanics
Anionic polymerization of ϵ‐caprolactone conducted in THF solvent has been compared with polymerizations initiated with aluminium alkoxides. The latter processes have been kinetically analysed as the pseudoionic processes, i. e. with propagation proceeding by insertion. In the pseudoanionic reaction active species are aggregated. The methods of solving kinetic schemes involving aggregation ⇋ deaggregation equilibrium, followed by the chain growth on deaggregated species are described. These kinetic methods have been used to determine the propagation rate constants. The relationships between structures of the growing species and their reactivities have thus been determined.