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Chain transfer by radical addition‐fragmentation mechanisms: Synthesis of macromonomers and end‐functional oligomers
Author(s) -
Rizzardo Ezio,
Meijs Gordon F.,
Thang San H.
Publication year - 1995
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/masy.19950980109
Subject(s) - allylic rearrangement , chain transfer , chemistry , polymer chemistry , fragmentation (computing) , end group , polymer , side chain , double bond , radical polymerization , polymerization , organic chemistry , catalysis , computer science , operating system
Appropriately substituted allylic sulfides, sulfones, bromides, phosphonates, stannanes and peroxides, vinyl ethers and thionocarbonyl compounds are effective chain transfer agents in free radical polymerizations. These compounds function by a radical addition‐fragmentation mechanism by which fragments derived from the chain transfer agents are installed at both ends of polymer chains. This provides a convenient method for preparing both mono‐ and di‐end functional oligomers and polymers. Allylic peroxides fragment to give epoxy end groups while the other allylic compounds give rise to macromonomers by introducing terminal double bonds.