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Polymerization of methyl methacrylate in micellar phase: A kinetic study
Author(s) -
Panda Rahas B.,
Patel N.,
Sinha B. K.
Publication year - 1988
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1988.070350819
Subject(s) - polymerization , methyl methacrylate , monomer , chemistry , polymer chemistry , micelle , pulmonary surfactant , reaction rate constant , polymer , aqueous solution , kinetics , organic chemistry , biochemistry , physics , quantum mechanics
Polymerization of methyl methacrylate (MMA) using Ce(IV) as initiator in aqueous nitric acid solution in the presence of sodium lauryl sulphate (NaLS) has been studied kinetically at a temperature range of 25–35°C. The rate of polymerization ( R p ) increases with increasing concentration of NaLS, and it was also proportional to [MMA] 2 ; but, in the presence of NaLS, the change of R p with respect to [Ce(IV)] and [H + ] were not linear and similarly the rate of Ce(IV) disappearance was not proportional to its original concentration. The overall activation energy of the polymerization process in presence of 0.01 M NaLS was found to decrease by ∼ 7.0 kcal mol −1 . The monomer–micelle association constant has been calculated to be 5.135 × 10 4 mol −1 L. The polymer obtained in surfactant medium is sparingly soluble in benzene and DMSO. From infrared spectra clear evidence of vinyl polymerization was obtained.