Premium
Shining a light on catalytic chain transfer
Author(s) -
Pierik Sebastiaan C.J.,
Vollmerhaus Rainer,
van Herk Alex M.,
German Anton L.
Publication year - 2002
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 - 10.1002/1521-3900(200206)182:1<43::aid-masy43>3.0.co;2-u
Subject(s) - catalytic chain transfer , chain transfer , polymerization , catalysis , methyl methacrylate , polymer chemistry , styrene , living polymerization , chain termination , photochemistry , chemistry , acrylate , radical polymerization , kinetic chain length , methyl acrylate , chain (unit) , materials science , polymer , organic chemistry , copolymer , physics , astronomy
The catalytic chain transfer polymerization of styrene is only truly effective when the reaction mixture is exposed to (UV‐)light. The apparent chain transfer constant depends inversely on radical concentration and can be increased up to 8000. These results can be explained by combining aspects of both catalytic chain transfer and the formation of cobalt‐carbon bonds. For the catalytic chain transfer polymerization of n ‐butyl acrylate a chain transfer constant of 650 was found. The resulting transfer coefficient has the same order of magnitude as the one for n ‐butyl methacrylate. This means that the absence of an α‐methyl group hardly influences the transfer step itself. Furthermore, the effect of possible impurities on the catalytic chain transfer polymerization of methyl methacrylate is investigated.