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Microemulsion and conventional emulsion copolymerizations of styrene with methyl methacrylate
Author(s) -
Reddy G. V. Ramana,
Devi N. Gayathri,
Panda Jayakishore
Publication year - 2007
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.26310
Subject(s) - styrene , reactivity (psychology) , methyl methacrylate , microemulsion , polymer chemistry , chemistry , emulsion , emulsion polymerization , copolymer , nuclear chemistry , pulmonary surfactant , organic chemistry , polymer , medicine , biochemistry , alternative medicine , pathology
Abstract The microemulsion (M.E.) and conventional emulsion (C.E.) copolymerizations of styrene (STY) with methyl methacrylate (MMA) are carried out at 70°C by employing n ‐pentanol (PA) and n ‐octanol (OA), respectively, as cosurfactants along with sodium lauryl sulfate (SLS), as surfactant in the reaction media, and potassium persulphate (KPS) as initiator. The copolymers are characterized by FTIR, NMR, TG/DTA, and GPC techniques. The reactivity ratios are evaluated by employing Fineman‐Ross (F‐R), Kellen‐Tüdös (K‐T), and Mayo‐Lewis integration (M‐L‐I) methods. The K‐T method yields the apparent reactivity ratios, 0.73 ( r STY ), 0.39 ( r MMA ) and 0.55 ( r STY ), 0.50 ( r MMA ), respectively, for the M.E. and C.E. copolymerizations of STY and MMA with PA as the cosurfactant present in the reaction media. And the K‐T method yields the apparent reactivity ratios, 0.56 ( r STY ), 0.43 ( r MMA ), and 0.42 ( r STY ), 0.51 ( r MMA ), respectively, for the M.E. and C.E. copolymerizations of STY and MMA with OA as the cosurfactant present in the reaction media. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007