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Interfacial effects on the viscosity and the morphology of a thermotropic liquid crystalline polymer

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Summary

The apparent viscosity of nematic liquid crystal polyester measured by using capillary-tube viscometers showes a dependence on tube diameter and a yield stress in the low shear rate region called Region I. When the wall thickness measured by SEM is subtracted from the tube diameter, the viscosity becomes independent of tube diameter but still showes the Region I. This behavior may be caused by the molecular orientation at the wall of the capillary-tube.

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Referewnces

  1. Cifferi, A., Krigbaum, W.R., Meyer, R.B., “Polymer Liquid Crystal” Academic Press, New York London (1982)

    Google Scholar 

  2. Wissbrun, K.F., J. of Rheology, 25(6), 619 (1981)

    Google Scholar 

  3. Wissbrun, K.F., Griffin, A.C., J. Polym. Sci., Polym. Phys. Ed., 20 1835 (1982)

    Google Scholar 

  4. Kiss, G., J. of Rheology, 30(3), 585 (1986)

    Google Scholar 

  5. Kiss, G., Poter, R.S., J. Polym. Sci., Polym. Phys. Ed.,18,361 (1980)

    Google Scholar 

  6. Fisher, J., Fredrickson, A.G., Mol. Cryst. Liq. Cryst., 8, 267 (1969)

    Google Scholar 

  7. Yoon, J.H., Chung, I.J., MS thesis, KAIST, Korea (1985)

    Google Scholar 

  8. Onogi, S., Asada, T., “Rheology”.vol.1, Astrarita, G., Marrucci, G., Nicolais, L., Eds., Pleum, New York (1980)

    Google Scholar 

  9. de Gennes, P.G., “The Physics of Liquid Crystals”, Carendon Press, Oxford (1974)

    Google Scholar 

  10. Asrar, J., Toriumi, H., Watanabe, J., Krigbaum, W.R., Cifferi, A., J. Polym. Sci., Polym. Phys. Ed., 21,1119 (1983)

    Google Scholar 

  11. Krigbaum, W.R., Watanabe, J., Ishikawa, T., Macromolecules 16, 1271 (1983)

    Google Scholar 

  12. Noll, N., Arch. Rational Mech. Anal., 2, 197 (1958)

    Google Scholar 

  13. Lobe, V.M., White, J.L., Polym. Eng. Sci., 19, 617 (1979)

    Google Scholar 

  14. Creagh, L.T., Kmetz, A., Mol. Cryst. Liq. Cryst., 24, 59 (1973)

    Google Scholar 

  15. Patel, D.L., Duprê, D.B., Rheol. Acta, 18, 662 (1979)

    Google Scholar 

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Authors and Affiliations

  1. Department of Chemical Egineering, Korea Advanced Institute of Science and Technology, Cheongryang, P.O. Box 131, Seoul, Korea

    Boo Young Shin & In Jae Chung

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  1. Boo Young Shin
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  2. In Jae Chung
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Shin, B.Y., Chung, I.J. Interfacial effects on the viscosity and the morphology of a thermotropic liquid crystalline polymer. Polymer Bulletin 20, 399–405 (1988). https://doi.org/10.1007/BF00255743

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  • DOI: https://doi.org/10.1007/BF00255743

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