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Comparison of N , N ′‐bidentate ligands in copper‐catalyzed atom transfer polymerization of styrene
Author(s) -
DiRenzo Geraldine M.,
Messerschmidt Martin,
Mülhaupt Rolf
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19980701)19:7<381::aid-marc381>3.0.co;2-c
Subject(s) - polymerization , diimine , molar mass , styrene , polymer chemistry , bromide , denticity , reversible addition−fragmentation chain transfer polymerization , chain transfer , chemistry , catalysis , bipyridine , atom transfer radical polymerization , copper , polymer , copolymer , radical polymerization , organic chemistry , crystal structure
Atom transfer polymerization of styrene using N ‐aryl‐substituted pyridinimines and N , N ′‐diaryl‐substituted diimines as N , N ′‐ligands in the presence of Cu(I)Br and 1‐phenylethyl bromide has been investigated and compared with the analogous 2,2′‐bipyridine system. A molar mass increase which is consistent for a controlled polymerization with a target molar mass of 10000 g · mol −1 is observed with the 2,2′‐bipyridine ( 1 ) and the pyridinimine ( 2a ) systems. The polymerization of styrene with the N , N ′‐diimine system ( 3 ) is much less controlled, yielding polymers with higher molar masses than expected.