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Phase Transition and Self-Assembling Structures of Polymer Mixtures under Shear Flow

  • T. Hashimoto
  • T. Takebe
  • K. Fujioka
Part of the Springer Proceedings in Physics book series (SPPHY, volume 52)

Abstract

We discuss self-assembling structures and phase transition of polymer systems under a Couette type shear-flow. Ternary systems with polymer A + polymer B + solvent, forming a semidilute solution of A/B mixtures, exhibit strongly elongated self-assembling structures under the shear and are brought back into single-phase state at a higher shear rate. The drop of critical temperature with shear is much larger than that for the critical mixture of simple liquids by three-to-four orders of magnitude. The ternary systems with off-critical compositions exhibit ellipsoidal droplets with an extremely narrow size distribution at a low shear rate and a shear-induced cluster-to-percolation transition at a higher shear-rate. Finally a trend completely opposite to the shear-induced homogenization will be presented for a binary mixture of polymer A + solvent.

Keywords

Shear Rate Cloud Point Shear Flow Hydrodynamic Interaction Concentration Fluctuation 
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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • T. Hashimoto
  • T. Takebe
    • 1
  • K. Fujioka
    • 1
  1. 1.Department of Polymer ChemistryKyoto UniversityKyoto 606Japan

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