NDLI: Preparation of Methyl methacrylate/styrene Core-shell Latex by Emulsion Polymerization

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Preparation of Methyl methacrylate/styrene Core-shell Latex by Emulsion Polymerization

Content Provider	Semantic Scholar
Author	Kang, Don-O Lee, Nae-Woo Seul, Soo-Duk Lee, Sun-Ryong
Copyright Year	2002
Abstract	Core-shell polymers of methyl methacrylate/styrene pair were prepared by sequential emulsion polymerization in the presence of sodium dodecyl benzene sulfonate(SDBS) as an emulsifier using ammonium persulfate(APS) as an initiator. The characteristics of these core-shell polymers were evaluated. Core-shell composite latex has the both properties of core and shell components in a particle, where as polymer blonds or copolymers show a combined properties from the physical properties or two homopolymers. This unique behavior of core-shell composite latex can be used in many industrial fields. However, in preparation of core-shell composite latex, several unexpected phenomina are observed, such as, particle coagulation, low degree of polymerization, and formation of new particles during shell polymerization. To solve the disadvantages, we studied the effects of surfactant concentrations, initiator concentrations, and reaction temperature on the tore-shell structure or PMMA/PSt and PSt/PMMA. Particle size and particle size distribution were measured by using particle size analyzer, and the morphology of the core-shell composite latex was observed by using transmission electron microscope. Glass transition temperature() was also measured by using differential scanning calorimeter. To identify the core-shell structure, pH of the composite latex solutions were measured.
Starting Page	21
Ending Page	30
Page Count	10
File Format	PDF HTM / HTML
Volume Number	37
Alternate Webpage(s)	http://210.101.116.28/W_files/kiss5/22301219_pv.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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