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The role of the cosurfactant in the miniemulsion copolymerization of vinyl acetate and n ‐butyl acrylate
Author(s) -
Delgado J.,
ElAasser M. S.,
Silebi C. A.,
Vanderhoff J. W.
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880200153
Subject(s) - miniemulsion , copolymer , hexadecane , vinyl acetate , monomer , polymer chemistry , acrylate , nucleation , kinetics , octadecane , butyl acrylate , chemistry , pulmonary surfactant , emulsion , polymerization , materials science , chemical engineering , organic chemistry , polymer , biochemistry , physics , quantum mechanics , engineering
The role of the cosurfactant in the miniemulsion copolymerization process of 50:50 molar ratio vinyl acetate/n‐butyl acrylate miniemulsion copolymerization is analyzed. The mixed emulsifier system used to prepare the miniemulsions was sodium hexadecyl sulfate as surfactant and hexadecane as cosurfactant. It is shown that even though hexadecane plays an important role in the distribution of the monomers between the different phases present during the copolymerization process, it does not greatly affect the kinetics. It is the presence of stable submicron droplets what really alters the kinetics by shifting the particle nucleation mechanism from the aqueous phase to the monomer droplets.