Premium
Quantitative comparison of selectivities in the polymerization of cyclic esters
Author(s) -
Baran Jolanta,
Duda Andrzej,
Kowalski Adam,
Szymanski Ryszard,
Penczek Stanislaw
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971230110
Subject(s) - polymerization , steric effects , selectivity , chemistry , chain transfer , polymer chemistry , living polymerization , organic chemistry , polymer , catalysis , radical polymerization
Chain transfer processes (k tr ) taking place in the polymerization (anionic and pseudoanionic) of cyclic esters (lactones) are reviewed. These reactions are mostly responsible for the departure of these systems from the fully controlled (living) polymerizations. The ratios of k p /k tr have been determined for a number of initiating systems and the structures of the growing species are related to their selectivity, expressed by k p /k tr . It has been shown that the less reactive and more sterically crowded active species polymerize more selectively.