Surfactant effects in the emulsion polymerization of vinyl acetate
β Scribed by C. H. Lee; R. G. Mallinson
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 624 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
Transport of free radicals out of latex particles into the aqueous phase plays an important role in the emulsion polymerization of vinyl acetate. This so-called "desorption" process involves chain transfer to monomer which generates a mobile an8 rather stable monomer-unit free radical followed by th
## Abstract The kinetics of vinyl chloride and vinyl acetate emulsion polymerization are reexamined. The validity of Ugelstad's model for systems with high desorption rate is confirmed by simulating conversion histories for both systems at different initiator concentrations and particle numbers. On
The emulsifier-free emulsion polymerization of vinyl acetate was carried out in the absence or in the presence of some electrolytes such as sodium chloride, calcium chloride, aluminum chloride, sodium sulphate, and ammonium phosphate at 50ΠC using potassium persulphate-sodium bisulphite as a redox i
The stability of vinyl acetate miniemulsions employing polyvinyl alcohol (PVOH) as the surfactant, and hexadecane and/or various polymers as the cosurfactant, were studied. Shelf lives (to phase separation) and monomer droplet sizes were measured. The results indicate that it is possible to prepare