## Abstract Polystyrene/poly(vinyl acetate) latex nanoparticles with a coreβshell morphology in an emulsifierβfree emulsion polymerization system were prepared with purified styrene and vinyl acetate (VAc) as monomers and 2,2β²βazo bis(2βamino propane) dihydrochloride (ABA,2HCl) as the initiator and
Preparation of emulsifier-free polystyrene by conventional emulsion polymerization with a hydrolysable emulsifier
β Scribed by Y. Itoh; R. Akasaka; K. Takahashi
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 89 KB
- Volume
- 108
- Category
- Article
- ISSN
- 0021-8995
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In the present work polymer microgels were prepared by emulsifier-free emulsion copolymerization of unsaturated polyesters (UPs) with end carboxyl groups and styrene (St). The nucleation mechanism of UP-St emulsifier-free emulsion polymerization was proposed. The effects of the ratio of the monomers
The kinetics of emulsifier-free emulsion polymerization of vinyl acetate using the redox initiation system of potassium persulfate-potassium metabisulfite was studied. The effect of the reaction conditions on the rate of polymerization was also investigated. The polymerization proceeded smoothly unt
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
Emulsifier-free emulsion polymerization of styrene (St) and copolymerization of St and 4-vinyl pyridine (4VP) in the presence of ammonium persulfate were studied. A comparison between the two polymerization systems was made. It was found that there were big differences comparing polymerization rate,