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Synthesis of telechelics and telomers by radical polymerization
Author(s) -
Heitz W.
Publication year - 1987
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.19870100116
Subject(s) - telomerization , polymerization , polymer chemistry , reversible addition−fragmentation chain transfer polymerization , chain transfer , copolymer , bifunctional , living free radical polymerization , monomer , radical polymerization , polymer , chemistry , living polymerization , condensation polymer , materials science , organic chemistry , catalysis
Summary Telechelics are α, Q‐bifunctional oligomers or low molecular weight polymers. They find use to obtain block copolymers in polycondensation and polyaddition reactions. Telechelics can be synthesized in an initiator controlled polymerization or in a telomerization. In the initiator controlled preparation of telechelics by radical polymerization the efficiency of the initiator can be higher than 0.9 if the polymerization is effected in bulk or at high concentrations. The initiators suitable to introduce functional end groups are discussed. Only those monomers can be used which terminate by combination. This is not a limitation in telomerization. Transfer agents resulting in polymers with two functional end groups are discussed.