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Synthesis and characterization of methacrylic acid–ethyl acrylate copolymers
Author(s) -
Bajaj P.,
Goyal Meenakshi,
Chavan R. B.
Publication year - 1994
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.1994.070531307
Subject(s) - copolymer , methacrylic acid , polymer chemistry , ethyl acrylate , monomer , emulsion polymerization , acrylate , aqueous solution , polymerization , methacrylate , reactivity (psychology) , chemistry , materials science , organic chemistry , polymer , medicine , alternative medicine , pathology
Copolymerization of methacrylic acid (MAA) and ethyl acrylate (EA) was performed in aqueous medium in the presence of an emulsifier with MAA as the major component (53.7–82.3 mol %). Emulsion stability was studied as a function of concentration and the nature of the emulsifier (ionic or nonionic). Copolymers were characterized using IR and 1 H‐NMR spectroscopy. 13 C‐NMR spectra of MAA–EA copolymers have been discussed in terms of their triad monomer sequence distributions. Reactivity ratios of the MAA–EA pair were determined using a nonlinear least‐square errors in variables method. Partition of the monomers in aqueous and organic phases was studied using a gas chromatographic technique. A two‐loci polymerization mechanism was proposed on the basis of this partition behavior and the calculated composition of the oligomeric radicals formed in the initial stages of polymerization. © 1994 John Wiley & Sons, Inc.