Article
  • Determination of Chain Transfer Constant in the Synthesis of Poly(vinyl acetate) mono Thiol by Thiolacetic acid : Ⅱ
  • Lee SY, Shin YJ
  • 티올초산에 의한 폴리초산비닐모노티올의 합성시 연쇄이동상수의 측정 : Ⅱ
  • 이서용, 신영조
Abstract
Free radical polymerization of thiolacetic acid onto vinyl acetate was investigated in the methyl alcohol medium by using 2,2'-azobisisobutyronitrile as initiator. The number-ave age degree of polymerization were measured by gel permeation chromatography (GPC)-viscometric method. In addition, the chain transfer constant(Cχ) was determined by using the Mayo equation. It was determined to be 0.186 at 60℃. It was found that chain transfer constant was an effective ordering factors as a forecast of free radical polymerization reactivity for vinyl acetate and thiolacetic acid. Therefore, It was also shown that thiolacetic acid can be commercially used as not only a chain transfer agent for poly(vinyl acetate) mono thiol (PVACT) but also a effective compound for thiol functional group in the free radical polymerization.

초산비닐과 티올초산의 자유 라디칼 중합을 메틸알코을 용액중에서 중합 개시제로서 아조비스이소부티로니트릴을 사용하여 행하였다 수평균중합도는 gel permeation chromatography(GPC)-viscometry방법에 의해 측정하였으며, 아울러 연쇄이동상수는 Mayo의 방정식으로 구하였다. 초산비닐에 대한 티올초산의 연쇄이동상수는 온도 60℃에서 0.186이었다. 이 값은 초산비닐과 티올초산에 대한 자유 라디칼 중합의 활성을 예측하는 효과적인 지표인자임을 알았다. 따라서 티올초산은 자유 라디칼 중합에서 연쇄이동제 뿐만 아니라 티올기의 유용한 공급물질로서도 실용적으로 사응 가능함을 알았다.

Keywords: free radical polymerization; vinyl acetate; thiolacetic acid; chain transfer constant; Mayo equation

References
  • 1. Lee SY, Sim HS, Kim BK, Shin YJAnnual Spring Meeting of Poly. Soc. of Korea (1995)
  •  
  • 2. Pichot C, Pellicer R, Grossetete P, Guillot J, Makromol. Chem., 185, 113 (1984)
  •  
  • 3. Okaya T, Polym.(Japan), 37, 682 (1988)
  •  
  • 4. Zilberman EN, J. Macromol. Sci.-Rev. Macromol. Chem. Phys., C35(1), 47 (1995)
  •  
  • 5. Xie TY, Hamielec AE, Wood PE, Woods DR, Polymer, 32, 537 (1991)
  •  
  • 6. Xie TY, Hamielec AE, Wood PE, Woods DR, Polymer, 32, 1098 (1991)
  •  
  • 7. Xie TY, Hamielec AE, Wood PE, Woods DR, Polymer, 32, 1696 (1991)
  •  
  • 8. Hoyle CE, Hensel RD, Grubb MB, J. Polym. Sci. A: Polym. Chem., 22, 1865 (1984)
  •  
  • 9. Mayo FR, J. Am. Chem. Soc., 65, 2324 (1943)
  •  
  • 10. Gregg RA, Mayo FR, Discuss. Faraday Soc., 2, 328 (1947)
  •  
  • 11. Mayo FR, J. Am. Chem. Soc., 75, 6133 (1953)
  •  
  • 12. Gregg RA, Alderman DM, Mayo FR, J. Am. Chem. Soc., 70, 3740 (1948)
  •  
  • 13. Kolthof IM, Harris WE, Ind. Eng. Chem. Anal., 18, 61 (1946)
  •  
  • 14. Walling C, J. Am. Chem. Soc., 70, 2561 (1948)
  •  
  • 15. Moore LO, Macromolecules, 16, 357 (1983)
  •  
  • 16. Moore LO, Macromolecules, 16, 359 (1983)
  •  
  • 17. Moore LO, Macromolecules, 21, 3122 (1988)
  •  
  • 18. Meijs GF, Rizzardo E, Thang SH, Macromolecules, 21, 3122 (1988)
  •  
  • 19. Solomor OF, Ciuta IZ, J. Appl. Polym. Sci., 6, 683 (1962)
  •  
  • 20. Odian GPrinciples of Polymerization, 3rd ed., 243 ~ 245, Wiley-Interscience Pub., New York (1991)
  •  
  • 21. Berger KC, Brandrup GPolymer Handbook, 3rd Ed., eds. by J. Brandrup and E.H. Immergut, p. II 81 ~ II 141, Wiley-Interscience Pub., New York (1989)
  •  
  • 22. Lee SY, Sim HS, Shin YJ, Polym.(Korea), 19(6), 883 (1995)
  •  
  • 23. ASTM D5225-92, Standard Test Method for Measuring Solution Viscosity of Polymers with a Differential Viscometer
  •  
  • 24. Benoit H, Grubisic Z, Rempp P, J. Polym. Sci. C: Polym. Lett., 5, 753 (1967)
  •  
  • 25. Haney MA, J. Appl. Polym. Sci., 30, 3023 (1985)
  •  
  • 26. Haney MA, J. Appl. Polym. Sci., 30, 3037 (1985)
  •  
  • 27. Park TK, Lee JO, Polym.(Korea), 15(3), 311 (1991)
  •  
  • 28. Potnis SP, Deshpande AM, Makromol. Chem., 153, 139 (1972)
  •  
  • 29. Olive GH, Olive S, Fortschr. Hochpolym. Forsch., 2, 496 (1961)
  •  
  • 30. Matsumoto M, Maeda M, J. Polym. Sci., 17, 438 (1955)
  •  
  • 31. Sakurada I, Sakaguchi Y, Hashimoto K, Kobunshi Kagaku, 19, 593 (1962)
  •  
  • 32. Clarke JT, Howard RO, Stockmayer WH, Makromol. Chem., 44-46, 427 (1961)
  •  
  • 33. Crumpler JB, Yoe JHChemical Computations and Errors, p. 127, John Wiley and Sons, Inc., New York (1965)
  •  
  • 34. Hardy G, Varga J, Nytrai K, Tsajlik I, Zubonyai L, Vysokomol. Soedin., 6, 758 (1964)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
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This Article

  • 1996; 20(2): 233-240

    Published online Mar 25, 1996