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Chemistry and kinetics of the chain transfer reaction
Author(s) -
Farina Mario
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.19870100114
Subject(s) - chain transfer , chemistry , monomer , chain (unit) , polymer , kinetics , transfer agent , kinetic chain length , polymerization , mass transfer , copolymer , chain termination , solvent , polymer chemistry , organic chemistry , radical polymerization , chromatography , physics , quantum mechanics , astronomy
Chain transfer may be defined as a process in which the growing chain loses its capacity for further growth and the transfer agent (initiator, monomer, polymer, solvent or an extraneous compound) becomes capable of starting a new chain. This reaction has been subjected to extensive studies both for its relevance in interpreting the polymerization mechanism and for its practical importance as a method for controlling the molecular mass. In this communication the chemistry of the process is first described, then the classical kinetic approach based on the Mayo equation. Finally a selected number of recent results is discussed: the production of oligomers, the role of chain transfer in copolymerization, formation of branched polymers, catalyzed transfer and use of polyfunctional transfer agents.