Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Preparation of Methyl Methacrylate-Styrene System Core-Shell Latex by Emulsion Polymerization

유화중합에 의한 Methyl Methacrylate-Styrene계 Core-Shell 라텍스 입자 제조에 관한 연구

  • Kim, Nam-Seok (Dept. of Chemical Engineering, Changwon National University) ;
  • Kim, Duck-Sool (Dept. of Computer Engineering, Tongmyong University of Information Technology) ;
  • Lee, Seok-Hee (Dept. of Science Education, Busan National University of Education) ;
  • Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
  • 김남석 (창원대학교 공과대학 화공시스템공학과) ;
  • 김덕술 (동명정보대학교 공과대학 컴퓨터공학과) ;
  • 이석희 (부산교육대학교 과학교육학과) ;
  • 박근호 (창원대학교 공과대학 화공시스템공학과)
  • Published : 2005.06.30
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Abstract

Core-shell polymers of methyl methacrylate-styrene system were prepared by sequential emulsion polymerization in the presence of sodium dodecyl benzene sulfonate(SDBS) as an emulsifier using ammonium persulfate(APS) in an initiator and 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, whereas polymer blends or copolymers show a combined physical properties of two homopolymers. This unique behavior of core-shell composite latex can be used in various industrial fields. However, in preparation of core-shell composite latex, several unexpected matters are observed, for examples, particle coagulation, low degree of polymerization, and formation of new particles during shell polymerization. To solve this matters, we study the effects of surfactant concentrations, initiator concentrations, and reaction temperature on the core-shell structure of PMMA-PSt and PSt-PMMA. Particle size and particles 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 temperature was also measured by using differential scanning calorimeter. To identify the core-shell structure, pH of the composite latex solutions was measured.

Keywords

References

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