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Microemulsion and conventional emulsion copolymerizations of methyl methacrylate with acrylonitrile
Author(s) -
Ramana Reddy G. V.,
Prasad Babu Y. Phani,
Rami Reddy N. Subba
Publication year - 2002
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.10782
Subject(s) - acrylonitrile , microemulsion , copolymer , methyl methacrylate , polymer chemistry , emulsion polymerization , reactivity (psychology) , emulsion , chemistry , materials science , pulmonary surfactant , nuclear chemistry , organic chemistry , polymer , medicine , biochemistry , alternative medicine , pathology
The microemulsion (ME) and conventional emulsion (CE) copolymerizations of methyl methacrylate (MMA) with acrylonitrile (AN) are carried out at 70°C by employing sodium lauryl sulphate (SLS) and n ‐octanol (OA) as surfactant and cosurfactant, respectively, and potassium persulphate (KPS) as initiator. The copolymerization reactions are arrested at lower conversions, and the copolymers prepared are characterized by FTIR, NMR, TG/DTA, and GPC techniques. The reactivity ratios for microemulsion and conventional emulsion copolymerizations are evaluated by Fineman‐Ross (F‐R), Kelen‐Tüdös (K‐T), and Mayo‐Lewis (M‐L) graphical methods. The K‐T method yields the reactivity ratios of MMA (r MMA ) and AN (r AN ) as 2.03 ± 0.02 and 0.10 ± 0.02, and 1.97 ± 0.02 and 0.13 ± 0.02, respectively, for ME and CE copolymerization methods. The results are compared with the literature. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1503–1510, 2002