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Semi‐continuous emulsion copolymerization of vinyl acetate and butyl acrylate using a new protective colloid. Part 2. Effects of monomer ratio and initiator
Author(s) -
Sarac Ayfer,
Berber Hale,
Yildirim Hüseyin
Publication year - 2006
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.835
Subject(s) - ammonium persulfate , potassium persulfate , vinyl acetate , emulsion polymerization , copolymer , butyl acrylate , polymer chemistry , monomer , materials science , acrylate , persulfate , molar mass distribution , emulsion , colloid , polymerization , chemistry , polymer , organic chemistry , catalysis , composite material
Poly(vinyl acetate‐co‐butyl acrylate) latexes with N ‐methylol acrylamide were prepared by semi‐continuous emulsion polymerization. The influence of the different initiators and various monomer ratios was studied to relate its physicochemical and colloidal properties. The changes in the copolymer latexes with the use of ammonium persulfate and potassium persulfate initiators were investigated by monitoring viscosity, molecular weights, molecular weight distribution and particle size. It was found that almost all physicochemical and colloidal properties of the latexes followed the same trends for both initiators. Potassium persulfate gave slightly higher results for number‐ and weight‐average molecular weights than ammonium persulfate. Copyright © 2006 John Wiley & Sons, Ltd.