Synthesis and Selective Gas Permeability of Liquid Crystalline Poly(allyl sulfone) Networks

액정폴리알릴술폰의 합성 및 기체 선택투과 특성

  • Jo, Byung-Wook (Dept. of Chemical Engineering, Chosun University) ;
  • Choi, Jae-Kon (Dept. of Polymer Science & Engineering, Chosun University) ;
  • Kim, Joon-Seop (Dept. of Polymer Science & Engineering, Chosun University) ;
  • Choi, Soo-Kyung (Dept. of Chemical Engineering, Chosun University)
  • 조병욱 (조선대학교 생체의용화학공학과) ;
  • 최재곤 (조선대학교 응용화학소재공학과) ;
  • 김준섭 (조선대학교 응용화학소재공학과) ;
  • 최수경 (조선대학교 생체의용화학공학과)
  • Published : 2005.06.30


Liquid crystalline poly(allylsulfone) networks having $SO_2$ in a main chain and mesogens in a side chain were synthesized and their gas permeability and permselectivity were determined. The monomer II having two allyl groups on the each end group was able to form polymer networks by polymerization reaction, while the monomer I having only one allyl group was not. Molecular motion of the poly(allylsulfone) networks were retarded with increasing the cross-linking density, and the segmental motion of networks was developed enough to show isotropic phase transition. Gas permeabilities of poly(II-5 $01/I-OCH_3$ 99) were 2.58 baller for $O_2$ and 18.4 barrer for $H_2$. It means that hydrogen gas are 7 times more permeable than oxygen. Its permselectivities were high as 23.9 for ${\alpha}(H_2/N_2)$. The permselectivity was increased with increasing the cross-linking density. For example, ${\alpha}(H_2/N_2)$ was 36.8 in poly(II-5 $10/I-OCH_3$ 90), which was shown to be the highest value among these poly(allylsulfone) networks.


  1. A. H Fawcett, 'Olefin-sulfur Dioxide copolymers', Encyclopedia of polymer scinece and Engineering, ed. by J. Kroschwitz, 2 nd ed. p.10 John Wiley & Sons, New York, 1987
  2. W. J. Koros and G. K. Fleming, 'Membrane-based gas separation', J. Membr. Sci. 83, 1 (1993)
  3. I. Cabasso, 'Membranes', Encyclopedia of polymer Science and Engineering 9, 2nd ed., p.509, Wiley, New York, 1988
  4. H. Strahmann, 'Ullmann's Encyclopedia of Industrial Chemistry', A16, VCH, p.187, Weinheim, 1992
  5. S. A. Stern, 'Polymers for gas separations: the next decade', J. Membr. Sci., 94, 1 (1994)
  6. R. E. Kesting and A. K. Frizsche, Polymeric Gas Separation Membranes, Wiley, New York, 1993
  7. Boca Raton, 'Polymeric Gas Separation Membrane s', ed. by D. Paul and Y. Yampolskii, CRC Press, FL, 1994
  8. Dietrich Braun, Rolf-Peter Herr, Norbert Arnold, 'Liquid crystalline polysulfones, l Copolymers of l-alkenes with sulfur dioxide' Macromol. Chem Rapid Commum. 8, 359 (1987)
  9. C. K. Yeorn, C. U. Kim, B. S Kim, K. J. Kim, and J. M. Lee, 'Precise on-line measurement of permeation transients through dense polymeric membranes using a new permeation apparatus', Membrane Journal, 8(2), 86 (1998)
  10. C. K. Yeom, C. U. Kim, B. S Kim, K. J. Kim, and J. M. Lee, 'Permeation apparatus for on-line measurement of the permeation characteristics through dense polymeric membranes', J. Membr. Sci. 161, 55 (1999)
  11. Gerhard Maier, 'Gas Separation with polymer Membranes', Angew. Chem Int. Ed. 37(21), 2960 (1998)