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Modeling and experimental studies of emulsion copolymerization systems. III. Acrylics
Author(s) -
Saldívar Enrique,
Araujo Odair,
Giudici Reinaldo,
GuerreroSánchez Carlos
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.10003
Subject(s) - copolymer , butyl acrylate , monomer , vinyl acetate , methyl methacrylate , polymer chemistry , acrylate , emulsion , methacrylate , materials science , emulsion polymerization , particle size , particle (ecology) , chemical engineering , chemistry , organic chemistry , composite material , polymer , oceanography , engineering , geology
Abstract Using a previously published model and continuing the series of papers started with styrenic copolymers, predictions for evolution of conversion and average particle diameter in batch experiments are compared against experimental data for four emulsion copolymerizations involving at least one acrylic monomer: (1) methyl methacrylate/butyl acrylate, (2) methyl methacrylate/butadiene, (3) methyl methacrylate–vinyl acetate, and (4) butyl acrylate/vinyl acetate. For each system a fraction of factorial experiments were run covering simultaneous variations in five variables: initiator [ I ] and surfactant [ E ] concentrations, water to monomer ratio ( W / M ), monomer composition, and temperature. Data fitting is performed to represent the experimental data as several parameters are not available from independent experimental sources. The model is able to explain the effects of simultaneous changes in emulsifier concentration, initiator concentration, and water to monomer ratio on conversion and average particle size histories, although in some cases only qualitatively. An assessment of the degree in which a general emulsion copolymerization model is useful for practical applications is made. Physical insight is also gained by observing the trends of adjusted parameters with temperature and copolymer composition. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 1320–1338, 2002; DOI 10.1002/app.10003