Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Effect of Polymer Concentration and Solvent on the Phase Behavior of Poly(ethylene-co-octene) and Hydrocarbon Binary Mixture

Poly(ethylene-co-octene)과 탄화수소 2성분계 혼합물의 상거동에 대한 고분자 농도 및 용매의 영향

  • Lee, Sang-Ho (Department of Chemical Engineering, Dong-A University) ;
  • Chung, Sung-Yun (Department of Chemical Engineering, Dong-A University) ;
  • Kim, Hyo-Jun (Department of Chemical Engineering, Dong-A University) ;
  • Park, Kyung-Gyu (Department of Chemical Engineering, Dong-A University)
  • Published : 2004.12.31
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Abstract

Cloud-point and bubble-point curves for poly(ethylene-co-13.8 mol% octene) ($PEO_{13.8}$) and Poly(ethylene-co-15.3 mol% octene) ($PEO_{15.3}$) were determined up to $150^{\circ}C$ and 450 bar in hydrocarbons which have different molecular size and structure. Whereas ($PEO_{15.3}$+ n-pentane) system has cloud-point and bubble-point type transitions, ($PEO_{15.3}$+ n-propane) and ($PEO_{15.3}$+ n-butane) systems do only cloud-point type transition. In cyclo-pentane, -hexane, -heptane, and -octane, $PEO_{15.3}$ has a bubble-point transition. ($PEO_{13.8}$+ n-butane) mixture has a critical mixture concentration at 5 wt% PEO. (PEO + hydrocarbon) mixtures exhibit LCST type behavior. Solubility of PEO increases with hydrocarbon size due to increasing dispersion interaction which is favorable to dissolve PEO.

Poly(ethylene-co-13.8 mol% octene) ($PEO_{13.8}$), Poly(ethylene-co-15.3 mol% octene) ($PEO_{15.3}$)과 분자크기와 분자구조가 각각 다른 탄화수소의 2성분계 혼합물에 대한 cloud-point, bubble-point 압력을 $150^{\circ}C$, 450 bar까지 측정하였다. (PEO+n-프로판), (PEO+n-부탄) 2성분계 혼합물에서 cloud-point 곡선이 측정되었고, (PEO+n-펜탄) 혼합물에서는 cloud-point와 bubble-point 곡선이 모두 측정되었다. (PEO+시클로펜탄), (PEO+시클로헥산), (PEO+시클로 헵탄), (PEO+시클로옥탄) 2성분계 혼합물에서는 bubble-point 곡선이 측정되었다. (PEO+탄화수소) 2성분계의 압력-조성 등온곡선과 온도-조성 등압곡선은 PEO의 농도가 약 5 wt%일 때 각각 최고점과 최저점을 가졌다. (PEO+탄화수소) 2성분계는 PEO 농도가 5 wt%에서 임계조성을 가진다. PEO는 n-알칸과 시클로알칸 용매에서 LCST 유형의 상거동을 보여주며, 탄화수소의 분자크기가 증가할수록 PEO의 녹는 압력은 감소하였고 용해도는 증가하였다.

Keywords

References

  1. G. Baker, 'Modern Plastics', p.65, Chemical Week Associates, New York, Mid October, 1991
  2. M. J. Kaus, 'Modern Plastics Encyclopedia', p.68,Chemical Week Associates, New York, Mid October, 1988
  3. Sr. L. K. Mergenhagen, 'Modem Plastics', p.64, Chemical Week Associates, New York, Mid October, 1991
  4. R. P. Brentin, 'Modem Plastics Encyclopedia', p.57, Chemical Week Associates, New York, 1988
  5. K. C. Chan, H. Adidharma, and M. Radosz, 'Fluidliquid and fluid-solid transitions of poly(ethyleneco-octene-1) in sub- and supercritical propane solutions', Industrial & Engineering Chemistry Research, 39, 3069 (2000) https://doi.org/10.1021/ie990761e
  6. A. K. C. Chan, H. Adidharma, and M. Radosz, 'Fluid-liquid transitions of poly(ethylene-co-octene-l ) in supercritical ethylene solutions', Industrial & Engineering Chemistry Research, 39, 4370 (2000) https://doi.org/10.1021/ie990851j
  7. H.-S. Kwon and S.-H. Lee, 'Phase Behavior Study of Poly(ethylene-co-octene) in normal-Hydrocarbons', Elastomer, 38, 51 (2003)
  8. J. M. Prausnitz, R. N. Lichtenthaler, E. G. Azevedo, 'Molecular Thermodynamics of Fluid Phase Equilibria', 2nd ed., Prentice-Hall, Englewood Cliffs, NJ, 1986
  9. S.-H. Lee, M.A. LoStracco, B.M. Hasch, and M.A. Mchugh, 'Solubility of poly(ethylene-co-acrylicacid) in low molecular weight hydrocarbons and dimethyl ether. Effect of copolymer concentration, solvent quality, and copolymer molecular weight', J. Phys. Chem., 98, 4056 (1994)
  10. S.-H. Lee, and M.A. Mchugh, 'The Effect of Hydrogen Bonding on the Phase Behavior of Poly(ethylene-co-acrylate acid)-Ethylene-Cosolvent Mixtures at High Pressures', Korea J. Chem. Eng., 19, 114 (2002). https://doi.org/10.1007/BF02706883
  11. Engage polyolefin elastomer product information, Dupont-Dow Company, September 2001
  12. R. C. Reid, J. M. Prausnitz, and B. E. Poling, 'The Properties of Gases and Liquids', 4th ed., p.656, McGraw-Hill, New York, U.S.A., 1987
  13. T. E. Daubert, 'Vapor-Liquid Critical Properties of Elements and Compounds. 5. Branched Alkanes and Cycloalkanes', J Chem. Eng Data, 41, 365 (1996) https://doi.org/10.1021/je9501548