DOI QR코드

DOI QR Code

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

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

  1. M. Okubo, Y, Katsuta, K. Inoue, K, Nakamae, and T. Matsumoto, Dynamic Viscoelastic Behavior of Composite Polymer Emulsion Film, 日本接着學會誌, 16, 278 (1980)
  2. R. Blankenship and A. Kowalski, Production of core-sheath polymer particles containing voids, resulting product and use, U.S. Patent, 4,594,363 (1986).
  3. T. Y. Guo, G. L. Tang, G. L. Bao, M. D. Song, and B. B. Zhang, Toughening Modification of PS with n-BA/MMA/ Styrene Core-Shell Structured Copolymer from Emulsifier-Free Emulsion Polymerization, J. Appl. Polym. Sci.,, 90, 1290 (2003)
  4. P. Q. Sun, K. Zhao, D. H. Liu, and D. X. Buo, Prediction and Experiment of Core-Shell Particle Morphology of Vinyl Acetate and Butyl Acrylate, J. Appl. Poly. Sci.,, 83, 2930 (2002)
  5. M. Okubo, and H, Ahmad, Effect of Shell Thickness on the Temperature-Sensitive Property of Core-Shell Composite Polymer Particles, J. Poly. Sci., Part A: Poly. Chemi., 34, 3147 (1996)
  6. M. Ishida, J. Oshima, K. Y oshinaga, and F. Borii., Structural Analysis of Core-Shell Yype Polymer Particles Composed of Poly(butyl acrylate) and Poly(methyl methacrylate) by High-Resolution Solid-State C-13 n.m.r. Spectroscopy, Polym, 40, 3323(1999) https://doi.org/10.1016/S0032-3861(98)00541-2
  7. D. G. Cook and A. Rudin, A. Plumtree, Supermicron poly (butyl acrylate)/ polystyrene core-shell latexes, Appl. Polym Sci., 46, 1387 (1992)
  8. D. G. Cook, A. Rudin and A. Plumtree, The use of latex rubber-modified polystyrene as a model system for HIPS: Effect of particle Size, J. Appl. Polym Sci., 48, 75 (1993)
  9. J. D. Michael, Effects of core-shell latex morphology on film forming behavior, J. Appl. Polym Sci., 39, 2119 (1990)
  10. T.R. Paxton, Adsorption of Emulsifier on Polystyrene and Poly(Methyl Methacrylate) latex Particle, J. Colloid Interface. Sci., 31, 19 (1969)
  11. M. R. Grancio and D. J. Williams, The morphology of the monomer-polymer particle m styrene emulsion polymerization, J. Polym Sci., Polym Chemi., 8, 2617 (1970)
  12. M. R. Grancio and D. J. Williams, Molecular weight development in constant-rate styrene emulsion polymerization, J. Polym Sci., Polym Chemi., 8, 2733 (1970)
  13. P. Kusch and D. J. Williams, Equilibrium encapsulation of polystyrene latex particles, J. Polym Sci., Polym. Chem. Ed, 143 (1973)
  14. D. J. Williams, Particle morphology In emulsion polymerization, J. Polym Sci., Polym. Chem. Ed, 11, 301 (1973)
  15. P. Keusch, A. R. Graff, and D. J. Williams, Polymer Segment Density Distributions in Saturated Polystyrene Latex Systems, Macromolecules, 7, 304 (1974)
  16. P. Fabre and G. Meunier, Films From Soft-Core/Hard-Shell Hydrophobic Latexes : Structure and Thermo-mechanical Properties, J. Polym Sci., 38, 2989 (2000)