화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.14, No.2, 49-55, June, 2002
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Large amplitude oscillatory shear behavior of the network model for associating polymeric systems
Seung Ha Kim, Hoon Goo Sim, Kyung Hyun Ahn†, and Seung Jong Lee
  • School of Chemical Engineering, Seoul National University, San 56-1 Shillim-dong Gwanak-gu, Seoul 151-744, Korea
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To understand the large amplitude oscillatory shear (LAOS) behavior of complex fluids, we have investigated the flow behavior of a network model in the LAOS environment. We applied the LAOS flow to the model proposed by Vaccaro and Marrucci (2000), which was originally developed to describe the system of associating telechelic polymers. The model was found to predict at least three different types of LAOS behavior; strain thinning (G’ and G” decreasing), strong strain overshoot (G’ and G” increasing followed by decreasing), and weak strain overshoot (G’ decreasing, G” increasing followed by decreasing). The overshoot behavior in the strain sweep test, which is often observed in some complex fluid systems with little explanation, could be explained in terms of the model parameters, or in terms of the overall balance between the creation and loss rates of the network junctions, which are continually created and destroyed due to thermal and flow energy. This model does not predict strain hardening behavior because of the finitely extensible nonlinear elastic (FENE) type nonlinear effect of loss rate. However, the model predicts the LAOS behavior of most of the complex fluids observed in the experiments.
Keywords:large amplitude oscillatory shear (LAOS);complex fluid;network model
  1. Ahn KH, Osaki K, J. Non-Newton. Fluid Mech., 56(3), 267 (1995) 
  2. Bird RB, Curtiss CF, Armstrong RC, Hassaper O, Dynamics of polymeric liquids, vol. 2, 2nd Ed., John Wildy & Sons, New York, Chapter 20 (1987)
  3. Daniel C, Hamley IW, Wilhelm M, Mingvanish W, Rheol. Acta, 40(1), 39 (2001) 
  4. Dealy JM, Wissbrun KF, Melt rheology and its role in plastics processing: Theory and applications, VNR, New York, Chapter 5 (1990)
  5. Ferry JD, Viscoelastic properties of polymers, 3rd Ed., John Wiley & Sons, New York, Chapter 13 (1980)
  6. Giacomin JA, Oakley JG, J. Rheol, 36, 1529 (1992) 
  7. Giacomin AJ, Dealy JM, Large-amplitude oscillatory shear in A.A. Collyer (Ed.), Techniques in rheological measurement, Chapman and Hall, London, Chapter 4 (1993)
  8. Hyun K, Kim SH, Ahn KH, Lee SJ, J. Non-Newton. Fluid Mech., submitted (2002)
  9. Larson RG, The structure and rheology of complex fluids, Oxford University Press, New York (1999)
  10. Macosko CW, Rheology: Principles, measurements, and applications, VCH, New York (1994)
  11. Mason TG, Lacasse M, Grest GS, Levine D, Bibette J, Weitz DA, Phys. Rev. E, 56, 3150 (1997) 
  12. Phan-Thien N, Safari-Ardi M, J. Non-Newton. Fluid Mech., 74(1), 137 (1998) 
  13. Phan-Thien N, Newberry M, Tanner RI, J. Non-Newton. Fluid Mech., 92(1), 67 (2000) 
  14. Raghavan SR, Khan SA, J. Colloid Interface Sci., 185(1), 57 (1997) 
  15. See H, Korea-Aust. Rheol. J., 13(2), 67 (2001)
  16. Tirtaatmadja V, Tam KC, Jenkins RD, Macromolecules, 30(5), 1426 (1997) 
  17. Vaccaro A, Marrucci G, J. Non-Newton. Fluid Mech., 92(2-3), 261 (2000) 
  18. Wilhelm M, Maring D, Spiess HW, Rheol. Acta, 37(4), 399 (1998) 
  19. Wilhelm M, Reinheimer P, Ortseifer M, Rheol. Acta, 38(4), 349 (1999) 
  20. Wilhelm M, Reinheimer P, Ortseifer M, Neidhofer T, Spiess HW, Rheol. Acta, 39(3), 241 (2000) 
  21. Yosick JA, Giacomin AJ, J. Non-Newton. Fluid Mech., 66(2), 193 (1996) 
  22. Yosick JA, Giacomin AJ, Moldenaers P, J. Non-Newton. Fluid Mech., 70(1), 103 (1997) 
  23. Yziquel F, Carreau PJ, Tanguy PA, Rheol. Acta, 38(1), 14 (1999)