Gas transport properties of liquid crystalline polysiloxane with laterally attached side chain

Journal of Membrane Science

Volumn 133, Issue 2, 1997, Pages 245-253

  Kawakami, Hiroyoshi ^a   Mori, Yasumasa ^a   Abe, Hirokazu ^a   Nagaoka, Shoji ^a  

^a TOKYO METROPOLITAN UNIVERSITY   (Japan)

Author keywords

Activation energy; Gas permeability; Gas selectivity; Liquid crystalline polysiloxane; Nematic phase

Indexed keywords

ACTIVATION ENERGY; CARBON DIOXIDE; CRYSTAL MICROSTRUCTURE; GAS PERMEABLE MEMBRANES; LIQUID CRYSTAL POLYMERS; METHANE; NITROGEN; OXYGEN; SILICONES; SOLUBILITY; SYNTHESIS (CHEMICAL); TRANSPORT PROPERTIES;

GAS SELECTIVITY;

POLYMERIC MEMBRANES;

CARBON DIOXIDE; NITROGEN; OXYGEN; POLYSILOXANE;

ARTICLE; CHEMICAL STRUCTURE; GAS DIFFUSION; GAS PERMEABILITY; LIQUID CRYSTAL; PHASE TRANSITION; PRIORITY JOURNAL; SOLUBILITY; STRUCTURE ACTIVITY RELATION; SYNTHESIS; TEMPERATURE;

EID: 0031258212     PISSN: 03767388     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0376-7388(97)00086-0     Document Type: Article

References (22)

1. R.E. Kesting and A.K. Fritzsche, Polymeric gas separation membranes, John Wiley & Sons, 1993.
2. S.A. Stern, V.M. Shah and B.J. Hardy, Structure/permeability relationships in silicone polymers, J. Polym. Sci., Polym. Phys., 25 (1987) 1263-1298.
3. K. Takada, H. Matsuya, T. Masuda and T. Higashimura, Gas permeability of polyacetylenes carrying substituents, J. Appl. Polym. Sci., 30 (1985) 1605-1616.
4. K. Matsumoto, P. Xu and T. Nishikimi, Gas permeation of aromatic polyimides. I: relationship between gas permeabilities and dielectric constants, J. Membrane Sci., 81 (1993) 15-22.
5. S.A. Stern, Y. Mi and H. Yamamoto, Structure /permeability relationships of polyimides membranes: applications to the separation of gas mixtures, J. Polym. Sci. Polym. Phys., 27 (1989) 1887-1909.
6. C.L. Aitken, W.J. Koros and D.R. Paul, Gas transport properties of biphenol polysulfones, Macromolecules, 25 (1992) 3651-3658.
7. H. Kawakami, J. Anzai and S. Nagaoka, Gas transport properties of soluble aromatic polyimides with sulfone diamine moieties, J. Appl. Polym. Sci., 57 (1995) 789-795.
8. H. Kawakami, M. Mikawa and S. Nagaoka, Gas transport properties in thermally cured aromatic polyimide membranes, J. Membrane Sci., 118 (1996) 223-230.
9. H. Kawakami, M. Mikawa and S. Nagaoka, Gas permeability and selectivity through asymmetric polyimide membranes, J. Appl. Polym. Sci., 62 (1996) 965-971.
10. M.S.K. Lee, G.W. Gray, D. Lacey and K.J. Toyne, Polysiloxanes with laterally attached side chains bearing terminal cyano groups, Makromol. Chem., Rapid Commun., 10 (1989) 325-331.
11. F. Hardouin, S. Mery, M.F. Achard, M. Mauzac, P. Davidson and P. Keller, Nematic-nematic modification in side-onfixed polysiloxanes, Liq. Crystals, 8 (1990) 565-575.
12. Y. Nagase and Y. Takamura, Side-chain liquid-crystalline polymers containing a siloxane spacer, 1. Synthesis of side-chain liquid-crystalline polymers containing siloxane bond in the spacer unit, Makromol. Chem., 193 (1992) 1225-1234.
13. L. Noirez, P. Keller and J.P. Cotton, On the structure and the chain conformation of side-chain liquid crystal polymers, Liq. Crystals, 18 (1995) 129-148.
14. [141 Y. Ly and Y.L. Cheng, Electrically-modulated variable permeability liquid crystalline polymeric membrane, J. Membrane Sci., 77 (1993) 99-112.
15. D.H. Weinkauf and D.R. Paul, Gas transport properties of thermotropic liquid-crystalline copolyesters. I. The effect of orientation and annealing, J. Polym. Sci., Polym. Phys., 30 (1992) 817-835.
16. D.H. Weinkauf, H.D. Kim and D.R. Paul, Gas transport properties of liquid crystalline poly (p-phenylene-terephthalamide), Macromolecules, 25 (1992) 788-796.
17. D.S. Chen, G.H. Hsiue and C.S. Hsu, Gas permeation through two side-chain liquid-crystalline polyacrylate-based membranes containing 4-methoxyphenyl 4-hexyloxybenzoate or 4-cyanophenyl 4-hexyloxybenzoate mesogenic side groups, Makromol. Chem., 193 (1992) 1469-1479.
18. D.R. Paul and W.J. Koros, Effect of partially immobilizing sorption on permeability and the diffusion time lag, J. Polym. Sci., Polym. Phys., 14 (1975) 675-685.
19. W.J. Koros and G.K. Fleming, Membrane-based gas separation, J. Membr. Sci., 83 (1993) 1-80.
20. 4 in aromatic polyimides, J. Appl. Polym. Sci., 34 (1987) 1767-1771.
21. S.V. Vasilenku, V.P. Shibaev and A.R. Khokhlov, Liquid-crystalline ordering in the melts of comb-like rnacromolecules with mesogenic group in the side chain, A theoretical model, Makromol. Cheem., 186 (1985) 1951-1960.
22. J.S. Chiou and D.R. Paul, Gas transport in a thermotropic liquid-crystalline polyester, J. Polym. Sci. Polym. Phys., 25 (1987) 1699-1707.