Advertisement

Rheology pp 393-398 | Cite as

Effect of Molecular Weight and Flow Type on Flow Birefringence of Dilute Polymer Solutions

  • Gerald G. Fuller
  • L. Gary Leal

Abstract

Birefringence measurements can be used to study conformation changes in a polymer solution due to the presence of flow. In the dilute concentration range, such studies have been carried out for simple shear flow1 and uniaxial extensional flow,2 but only for a single molecular weight in each case and for concentrations above 300 ppm. Neither the effect of flow type nor molecular weight has been adequately investigated, though each may be extremely important in “applications” such as the well-known “drag reduction” phenomenon. The present paper summarizes the results of flow birefringence experiments for 50 and 100 ppm solutions of three different MW samples of polystyrene dissolved in a viscous poly-chlorinated biphenyl solvent. A range of two-dimensional flow types was generated using a four roll mill.

Keywords

Drag Reduction Flow Type Roll Mill Velocity Gradient Tensor Simple Shear Flow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Philippoff, W., in: E. H. Lee (ed.), Proc. IV Intern. Congr. Rheol., Providence 1963, Vol. 2, p 343, Interscience Publ. (N. Y. 1965).Google Scholar
  2. 2.
    Pope, D. P. and Keller, A., Colloid & Polym. Sci. 255, 633 (1978).CrossRefGoogle Scholar
  3. 3.
    Fuller, G. G. and Leal, L. G., Flow Birefringence of Concentrated Polymer Solutions in Two-Dimensional Flows, forthcoming publication (1980).Google Scholar
  4. 4.
    Fuller, G. G., Rallison, J. M., Scmidt, R. L. and Leal, L. G., The Measurement of Velocity Gradients by Homodyne Light Scattering Spectroscopy, forthcoming publication (1980).Google Scholar
  5. 5.
    Fuller, G. G. and Leal, L. G., Flow Birefringence of Dilute Polymer Solutions in Two-Dimensional Flows, forthcoming publication (1980).Google Scholar
  6. 6.
    Polymer Handbook, Eds. Brandrup, J. and Immergut, E. H., John Wiley and Sons Publ. (1965).Google Scholar
  7. 7.
    Tanner, R. I., AICHE J. 22, 910 (1976).CrossRefGoogle Scholar
  8. 8.
    Ulbricht, W. L., Rallison, J. M. and Leal, L. G., A Criterion for Strong Flow Based on Microstructure Deformation, forthcoming publication (1980).Google Scholar
  9. 9.
    Peterlin, A., Polymer 2, 257(1961).CrossRefGoogle Scholar
  10. 10.
    Hinch, E. J., Proc. Symp. Polym. Lubrification, Brest (1974).Google Scholar
  11. 11.
    de Gennes, P. G., J. Chem. Phys. 60,5030 (1974).ADSCrossRefGoogle Scholar
  12. 12.
    Warner, H. R., Ind. Eng. Chem. Fund. 11, 379 (1972).MathSciNetCrossRefGoogle Scholar
  13. 13.
    Sankur, V. D., PhD. Thesis, California Institute of Technology (1977).Google Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • Gerald G. Fuller
    • 1
  • L. Gary Leal
    • 1
  1. 1.Department of Chemical EngineeringCalifornia Institute of TechnologyPasadeanUSA

Personalised recommendations