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http://dx.doi.org/10.12925/jkocs.2003.20.1.4

Preparation and Physical Properties of Poly(Styrene/Acrylate) Core-Shell Latex Particles  

Lee, Kyoung-Goo (Dept. of Chemical Engineering, Changwon National University)
Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.20, no.1, 2003 , pp. 27-32 More about this Journal
Abstract
The core-shell latex particles were prepared by sequential emulsion polymerization of alkyl methacrylate and styrene(ST) by using an water-soluble initiator(APS) after preparing monomer pre-emulsion in the presence of an anionic surfactant(SDBS). In organic/organic core-shell polymerization, the pre-emulsion method, which minimized required quantity of sulfactant, has been used to increase the conversion rate and the stability of core-shell latex particles as well as to reduce the formation of secondary particle that cause problems of soap-free emulsion during shell polymerization. We used several methods to observe the core-shell structure. The core-shell structure was studied by measuring pH change during hydrolysis by NaOH, glass transition temperature($T_g$) by differential scanning calorimeter(DSC), morphology of latex by transmission electron microscope(TEM) and change of particle size and distribution by a particle analyzer.
Keywords
emulsion polymerization; alkyl methacrylate; styrene; emulsifier;
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