화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.17, No.6, 397-402, June, 2009
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Controlling the Size and Surface Morphology of Carboxylated Polystyrene Latex Particles by Ammonium Hydroxide in Emulsifier-free Polymerization
Hyunbae Dong, Sang-Yup Lee†, and Gi-Ra Yi1
  • Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
  • 1Korea Basic Science Institute, Seoul 136-713, Korea
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In emulsifier-free, emulsion polymerization with ionizable comonomer, the ionization of the comonomer is critical in determining the size of the final polymeric particles at sub-micrometer scale. In this study, polystyrene latex beads with carboxylates on the surface were synthesized using acrylic acid as a comonomer. Specifically, ammonium hydroxide was added to the emulsifier-free polymerization system to promote the ionization of acrylic acid by increasing pH. Smaller polystyrene latex particles were produced by increasing the ammonium hydroxide concentration in the reaction system, due to the enhanced stability promoted by the ionization of acrylic acid during the nucleation step. In addition, the surface morphology of the polystyrene latex particles was controlled by the concentration of acrylic acid, the dissociation of which was influenced by the ammonium hydroxide concentration.
Keywords:polystyrene;acrylic acid;ammonium hydroxide;emulsifier-free polymerization;solubility.
  1. Cho YS, Yi GR, Moon JH, Kim DC, Lee BJ, Yang SM, Langmuir, 21(23), 10770 (2005)
  2. Jin Y, Zhu YH, Yang XL, Jiang HB, Li CZ, J. Colloid Interface Sci., 301(1), 130 (2006)
  3. Zhang S, Zhao XW, Xu H, Zhu R, Gu ZZ, J. Colloid Interf. Sci., 316, 168 (2006)
  4. Hillery AM, Pharm. Sci. Tech. Today, 1, 69 (1998)
  5. Caruso F, Colloids and Colloid Assemblies, Wiely-VCH, Weinheim, Germany (2004)
  6. Lee DY, Kim JH, J. Appl. Polym. Sci., 69(3), 543 (1998)
  7. Feeney PJ, Napper DH, Gilbert RG, Macromolecules, 20, 2922 (1987)
  8. Shouldice GT, Vandezande GA, Rudin A, Eur. Polym. J., 30, 179 (1993)
  9. Tanrisever T, Okay O, Sonmezoglu IC, J. Appl. Polym. Sci., 61(3), 485 (1996)
  10. Can S, Tanrisever T, J. Appl. Polym. Sci., 103(4), 2494 (2007)
  11. Shouldice GTD, Vandezande GA, Rudin A, Eur. Polym. J., 30, 179 (1994)
  12. Can S, Tanrisever T, J. Appl. Polym. Sci., 103(4), 2494 (2007)
  13. Zou D, Aklonis JJ, Salovey R, J. Polym. Sci. Part A: Polym. Chem., 30, 2443 (1992)
  14. Yamamoto T, Nakayama M, Kanda Y, Higashitani K, J. Colloid Interface Sci., 297(1), 112 (2006)
  15. Goodwin JW, Hearn J, Ho CC, Ottewill RH, Colloid Polym. Sci., 252, 464 (1974)
  16. Ceska GW, J. Appl. Polym. Sci., 18, 427 (1974)
  17. Ou JL, Yang JK, Chen H, Eur. Polym. J., 37, 789 (2001)
  18. Dossantos AM, Mckenna TF, Guillot J, J. Appl. Polym. Sci., 65(12), 2343 (1997)
  19. Fukuhara D, Sundberg D, JCT Res., 2, 509 (2005)
  20. Shoaf GL, Poehlein GW, J. Appl. Polym. Sci., 42, 1239 (1991)
  21. Mohanty PS, Kesavamoorthy R, Matsumoto K, Matsuoka H, Venkatesan KA, Langmuir, 22(10), 4552 (2006)