유화중합에 의한 PBA/PMMA Core/Shell 구조 라텍스 합성에서의 그래프팅 반응 속도론

박응식; 박영준; 황태원; 김중인; 김중현

HWAHAK KONGHAK, Vol.32, No.5, 651-658, October, 1994

Export Citation

유화중합에 의한 PBA/PMMA Core/Shell 구조 라텍스 합성에서의 그래프팅 반응 속도론

Kinetics of Grafting Reaction in Poly(n-butyl acrylate)-Poly(methyl methacrylate) Core/Shell Emulsion Polymerization

박응식, 박영준, 황태원, 김중인, 김중현

초록

2단계 유화중합법을 이용하여 poly(n-butyl acrylate)를 core로 하고 poly(methyl methacrylate)를 shell로 하는 라텍스 입자를 합성하고 이것의 그래프팅 효율을 용매추출법을 이용해서 구하였다. 유화중합 속도론을 그래프팅반응에 적용하여 그래프팅 반응의 속도식을 이끌어 낼 수 있었으며 이를 이용해서 그래프팅 반응의 효율을 계산할 수 있었다. 계산된 그래프팅 반응 효율은 실험에 의해서 구한 그래프팅 반응 효율과 유사한 경향을 나타내었으며 이를 이용해서 그래프팅 반응 속도 상수 K_ib의 값을 구할 수 있었다.

Latex particles which consist of poly(n-butyl acrylate)[p(n-BuA)] core and poly(methyl methacrylate)[PMMA] shell were prepared by two stage emulsion polymerization and the grafting efficiency(GE) of these latex particles was determined by the solvent extraction method. Kinetics of emulsion polymerization was applied to the grafting reaction and the grafting efficiency was calculated from the kinetic expression. The calculated result showed similar trend to the experimental values. The approximate value of the grafting reaction constant was obtained using this method.

[References]

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[2] Sunberg DC, Arndt J, Tang MY, J. Dispersion Sci. Tech., 5(3-4), 433 (1984)

[3] Chern CS, Poehlein GW, J. Polym. Sci. A: Polym. Chem., 25, 617 (1987)

[4] Chern CS, Poehlein GW, J. Polym. Sci. A: Polym. Chem., 28, 3072 (1990)

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[8] Bandrup J, Immergut JH, "Polymer Handbook," 3rd ed., Wiley, New York (1989)

[9] Gilbert RG, Napper DH, J. Macromol. Sci.-Rev. Macromol. Chem. Phys., C23(1), 127 (1983)