Premium
Mechanism and kinetics of the radical polymerization of acrylamide in inverse micelles
Author(s) -
Candau Françoise
Publication year - 1990
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.19900310106
Subject(s) - polymerization , kinetic chain length , chain transfer , micelle , monomer , chain growth polymerization , polymer chemistry , bulk polymerization , chemistry , polymer , radical polymerization , precipitation polymerization , ionic polymerization , toluene , solution polymerization , photochemistry , organic chemistry , aqueous solution
A kinetic study of the photoinitiated polymerization of acrylamide in oil/AOT/H 2 O reverse micelles has been investigated. Determinations of the dependence of the rates of polymerization and the molecular weights of the polymers on initiator and monomer concentrations, as well as the relative light intensity and the identity of the oil employed were performed. Rates of polymerization were measured by dilatometry, and polymer molecular weights were determined by viscometry. The polymerization was shown to be first order in monomer concentration, and the order of the termination step of the polymerization depended strongly upon the oil employed. When the oil was benzene, termination occurred by a biradical process. When benzene was replaced by toluene, a monoradical termination was shown to occur, suggesting that a degradative chain transfer to toluene is occurring in this case. The similarities and differences of polymerization in conventional emulsions and in micelles are discussed on the basis of these results.