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Modeling and experimental studies of emulsion copolymerization systems. I. Experimental results
Author(s) -
Araujo Odair,
Giudici Reinaldo,
Saldívar Enrique,
Ray W. Harmon
Publication year - 2001
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 - 10.1002/1097-4628(20010328)79:13<2360::aid-app1045>3.0.co;2-q
Subject(s) - copolymer , butyl acrylate , polymer chemistry , methyl methacrylate , emulsion polymerization , monomer , vinyl acetate , acrylic acid , acrylate , ternary operation , materials science , styrene , particle size , emulsion , methacrylate , chemical engineering , methyl acrylate , ternary numeral system , chemistry , polymer , organic chemistry , composite material , computer science , engineering , programming language
A systematic experimental and modeling study of several emulsion copolymerization systems has been performed, and will be reported in a series of papers. Ten binary and three ternary copolymerizations involving styrene, methyl methacrylate, butyl acrylate, butadiene, vinyl acetate, acrylic acid, and ethylene were studied varying polymerization temperature, monomer composition, water to monomer ratio, initiator and emulsifier concentrations. Conversion, particle size, copolymer composition, and gel content were measured at several reaction times. The goal of this series of papers is to assess our quantitative understanding of emulsion copolymerization expressed in the form of a comprehensive mathematical model applied to monomers widely used in industry. In this first paper of the series, a global comparison of the experimental results is made. It is observed that the gel content is higher in systems containing butyl acrylate and butadiene, and smaller in systems containing methyl methacrylate. Larger particle numbers are obtained for lattices containing acrylic acid and butadiene. It is also shown that, for most of the systems, integration of the simple Mayo–Lewis equation is adequate to explain the drift in copolymer composition observed experimentally. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 2360–2379, 2001