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Macromonomers as well‐defined building blocks in macromolecular engineering
Author(s) -
Peruch Frédéric,
Lahitte JeanFrançois,
Isel F.,
Lutz Pierre J.
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(200207)183:1<159::aid-masy159>3.0.co;2-7
Subject(s) - polymerization , molar mass , radical polymerization , polymer chemistry , monomer , polymer , macromonomer , materials science , living polymerization , chain transfer , coordination polymerization , anionic addition polymerization , reversible addition−fragmentation chain transfer polymerization , polymer science , composite material
The present work compares the efficiency of different polymerization methods to design well‐defined comb‐shaped structures based on macro monomers. Anionic polymerization remains the method of choice and allows the control of polymerization degree of the main chain and the length of the grafts. The presence of an active chain end on the backbone enabled the synthesis of a new type of hyperbranched polymers by reaction with appropriate low molar multifunctional compounds. Free radical polymerization is less efficient for the controlled homopolymerization of macromonomers but less sensitive to the presence of impurities. It requires in most cases long fractionation procedures to access well defined comb‐shaped fractions characterized by high molar masses. The controlled free radical polymerization constitutes an interesting alternative. The homopolymerization of macromonomers with late transition metal catalysts was also examined and comb‐shaped polymers characterized by a syndiotactic backbone and atactic grafts could be obtained.