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Kinetics and mechanism of styrene‐acrylonitrile copolymerization in micro‐emulsion
Author(s) -
Sanghvi Paresh G,
Pokhriyal Naveen Kumar,
Hassan P A,
Devi Surekha
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/1097-0126(200011)49:11<1417::aid-pi521>3.0.co;2-u
Subject(s) - copolymer , acrylonitrile , potassium persulfate , styrene , polymer chemistry , emulsion polymerization , materials science , kinetics , persulfate , ascorbic acid , polymerization , chemical engineering , chemistry , organic chemistry , polymer , catalysis , physics , food science , quantum mechanics , engineering , composite material
Stable and transparent poly(styrene‐acrylonitrile) latexes were produced by the polymerization of styrene‐acrylonitrile in ternary o/w micro‐emulsions containing sodium dodecyl sulfate as an anionic surfactant. Kinetics of copolymerization was studied at different temperatures using different concentrations of potassium persulfate and hydrogen peroxide/ascorbic acid. The suitability of existing model for homopolymerization was examined for styrene‐acrylonitrile copolymerization after appropriate modification. The latexes were characterized for particle size and number of particles by dynamic light scattering and TEM. The isolated products were characterized by 1 H and 13 C NMR as well as by thermal analysis. The overall size of particles was found to be between 15 and 20 nm. © 2000 Society of Chemical Industry