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Termination processes in group transfer polymerization
Author(s) -
Brittain William J.,
Dicker Ira B.
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.19930670130
Subject(s) - isomerization , monomer , methacrylate , polymerization , chemistry , chain transfer , gtp' , polymer chemistry , silylation , intramolecular force , chain termination , catalysis , photochemistry , radical polymerization , stereochemistry , organic chemistry , polymer , enzyme
Two major termination processes in the GTP of methacrylates and acrylates have been studied. For methacrylates, intramolecular cyclization is the dominant, if not sole, termination reaction. Both cyclization and O/C‐silyl isomerization of the chain end are observed for acrylates. Oligomerization experiments were used to study the relative rates of cyclization and propagation and the influence of temperature, catalyst and dp. Under typical GTP conditions for methacrylates, cyclization is at least two orders of magnitude slower than monomer addition.