유화중합의 모델연구 2. 삼모노머유화중합의 동력학

박상보; 서차수

Journal of the Korean Industrial and Engineering Chemistry, Vol.9, No.2, 300-305, April, 1998

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유화중합의 모델연구 2. 삼모노머유화중합의 동력학

Study on Model of Emulsion Polymeration 2. Kinetics of Termonomer Emulsion Potmnerization

박상보, 서차수

초록

세 종류의 모너머로 구성된 삼모노머중합의 동력학을 입자성장이 끝난 intervalⅡ 동안 pseudo-homopolymerization(PHP) 방법에 의하여 연구하였다. 삼모너중합의 Smith-Ewart 확장식과 순간중합조성식을 단일유화중합의 해당식과 유사하게 나타낼 수 있었다. 입자당 평균라디칼수와 순간중합조성을 라텍스입자내의 모노머조성을 변화시킴으로써 입자당 자유라디칼수가 한 개 이하인 계에서 예측하였다. 모델계산의 예로서 Styrene-Methyl methacrylate-Acrylonitrile(SMA)계의 속도상수들을 사용하였다.

Kinetics of termonomer emulsion polymerization during intervalⅡ(i.e, after completion of latex particle formation) were studied through pseudo-homopolymerization(PHP) method. Extended Smith-Ewart equation and equation of instantaneous polymer composition are respectively reduced to the corresponding equation for homopolymerization by defining average rate constants. Average number of radicals per particle and instantaneous polymer compositions were respectively predicted by varying termonomer composition within lates particles for systems containing no more than one growing radical per particle. Styrene-Methyl methacrylate-Acrylonitrile(SMA) system was used for model calculation.

[References]

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Park SB, Se CS, to be published
Storti G, Vitalini L, Albano M, Carra S, Morbidelli M, IUPAC Symposium SML-87, S. Margherita Ligure (Italy), May (1987)

[1] Blackley DC, "Emulsion Polymerization," Applied Science, London (1975)

[2] Lichti G, Gilbert RG, Napper DH, "Emulsion Polymerization," ed. I, Piirma, Academic Press, New York (1982)

[3] Gilbert RG, "Emulsion Polymerization," Academic Press, New York (1995)

[4] Smith WV, Ewart RH, J. Chem. Phys., 16, 592 (1948)

[5] Ballard MJ, Napper DH, Gilbert RG, J. Polym. Sci. A: Polym. Chem., 9, 939 (1981)

[6] Chen SA, Wu KW, J. Polym. Sci. A: Polym. Chem., 26, 1487 (1988)

[7] Mayo FD, Lewis FM, J. Am. Chem. Soc., 68, 1594 (1944)

[8] Nomura M, J. Appl. Polym. Sci., 26, 17 (1981)

[9] Park SB, Kim BK, Shin YJ, Polymer, 9, 746 (1989)

[10] Park SB, Chang HS, Shin YJ, Polymer, 14, 227 (1990)

[11] Park SB, Se CS, to be published

[12] Storti G, Vitalini L, Albano M, Carra S, Morbidelli M, IUPAC Symposium SML-87, S. Margherita Ligure (Italy), May (1987)