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Measurements of monomer partitioning in emulsion copolymerization systems
Author(s) -
Tognacci Riccardo,
Storti Giuseppe,
Bertucco Alberto
Publication year - 1996
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/(sici)1097-4628(19961226)62:13<2341::aid-app19>3.0.co;2-5
Subject(s) - copolymer , vinyl acetate , monomer , methyl methacrylate , polystyrene , styrene , polymer chemistry , polymer , emulsion polymerization , emulsion , solvent , materials science , chemical engineering , methacrylate , chemistry , organic chemistry , engineering
A new apparatus to measure the equilibrium solvent activity in a multiphase system containing a particulated polymer is presented. An experimental procedure to determine the monomer partitioning in typical emulsion copolymerization systems is developed; the method is devised in a way that no phase separation between water and swollen polymer particles is required in order to determine the monomer content in each phase. The analytical technique used is quantitative gas chromatography, either of the vapor or of the liquid phases. Different monomers (styrene, methyl methacrylate, and vinyl acetate) and polymeric matrices (polystyrene and methyl methacrylate–vinyl acetate copolymer) are examined both above and below saturation conditions (corresponding to intervals II and III of an emulsion polymerization process). The experimental results are compared with predictions of a literature model. © 1996 John Wiley & Sons, Inc.