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Anisotropic orientational behaviour of liquid crystalline polymer

  • Han Shi-fang  (韩式方)Email author
  • Wang Yu-bin  (毓宾)
  • Han Yu-lian  (韩毓莲)
Article
  • 28 Downloads

Abstract

For describing anisotropic behaviour of the material, thermotropic and lyotropic liquid crystalline polymers were investigated by polariscope to take microstructural photos. Experimental investigation on the rheological and rheo-optical behaviour of the HPC was reported. The HPC was used in a extrusion test, a small contraction, nearly planar extrudate and resonance instability due to shear disturbance were observed when the lyotropic LC polymer HPC solution was extruded. A simple stability theory of orientational motion of director vector was developed for the LC polymer fluid that extended flow of thermotropic LC polymer melts is very effective in producing a high degree of macroscopic orientation.

Key words

liquid crystalline polymer microstructural state of LC polymer contraction of extrudate of HPC solution extrusion-extensional flow orientational stability theory 

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References

  1. [1]
    HAN Shi-fang. Constitutive Equation and Computational Analytical Theory of Non-Newtonian Fluids[M]. Beijing: Science Press, 2000: 364. (in Chinese)Google Scholar
  2. [2]
    HAN Shi-fang. Constitutive equation of liquid crystalline polymeranisotropic viscoelastic fluid[J]. Acta Mechanica Sinica, 2001(5): 588–600. (in Chinese)Google Scholar
  3. [3]
    HAN Shi-fang. Rheology of liquid crystalline polymer-front direction in rheology[J]. Mechanics in Engineering, 2001(3): 1–6. (in Chinese)Google Scholar
  4. [4]
    WAGNER M H, IXNER A. T, GEIGER K. A note on the melt strength of liquid crystalline polymer[J]. J Rheol, 1997, 41(5):1087–1093.CrossRefGoogle Scholar
  5. [5]
    MANTIA E P, VALENZA A. Shear and nonisothermal elongational characterization of a liquid crystalline polymer[J]. Polymer Engineering and Science, 1989, 29(10): 625–631.CrossRefGoogle Scholar
  6. [6]
    HAN Shi-fang. An asymmetric constitutive equation for anisotropic viscoelastic fluid[J]. Acta Mechanica Sinica, 2007, 23(2): 149–158.CrossRefGoogle Scholar

Copyright information

© Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Han Shi-fang  (韩式方)
    • 1
    Email author
  • Wang Yu-bin  (毓宾)
    • 1
  • Han Yu-lian  (韩毓莲)
    • 1
  1. 1.Chengdu Institute of Computer ApplicationChinese Academy of SciencesChengduChina

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