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Comparison of living polymerization mechanisms. Acrylates and carbocationic polymerization
Author(s) -
Pugh Coleen,
Matyjaszewski Krzysztof
Publication year - 1993
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.19930670106
Subject(s) - polymerization , cationic polymerization , reversible addition−fragmentation chain transfer polymerization , living polymerization , chain transfer , ionic polymerization , chemistry , living free radical polymerization , polymer chemistry , photochemistry , radical polymerization , organic chemistry , polymer
The concept of a living polymerization is critically discussed. A system ranking various classes of “livingness” is proposed, and the importance of determining the real values of k tr /k p and k t /k p ratios is expounded. New living systems, including carbocationic polymerization and group transfer polymerization of acrylates are compared with classic ionic systems. The mechanism of propagation and the nature of the true active species are similar in both new and classic polymerizations. The role of various components which improve the “livingness” of the polymerizations is discussed and explained by dynamic equilibration between dormant and active species and suppression of side reactions.