Shear-Induced Nano-Macro Structural Transition in a Polymeric Bicontinuous Microemulsion
- 9 August 2001
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 87 (9) , 098301
- https://doi.org/10.1103/physrevlett.87.098301
Abstract
Bicontinuous microemulsions arise in a narrow concentration range for ternary blends containing two immiscible homopolymers and the corresponding diblock copolymer. Steady shear reveals four distinct regimes of response as a function of shear rate, corresponding to flow-induced transitions in fluid structure. In situ neutron scattering shows flow-induced anisotropy in the nanometer-scale microemulsion structure at moderate shear rates, while higher rates induce bulk phase separation, with micron-size morphology, which is characterized with in situ light scattering and optical microscopy.Keywords
This publication has 23 references indexed in Scilit:
- Evidence of a Sponge-to-Lamellar Phase Transition under Shear by X-Ray Scattering Experiments in a Couette CellPhysical Review Letters, 1998
- Structure and rheology of concentrated wormlike micelles [4]at the shear-induced isotropic-to-nematic transitionZeitschrift für Physik B Condensed Matter, 1998
- Shear-Induced “Homogenization” of a Diluted Polymer BlendPhysical Review Letters, 1997
- Shear-Induced Sponge-to-Lamellar Transition in a Hyperswollen Lyotropic SystemPhysical Review Letters, 1996
- Evolution of Microstructure during Shear Alignment in a Polystyrene-Polyisoprene Lamellar Diblock CopolymerMacromolecules, 1995
- Shear microscopy of the ‘‘butterfly pattern’’ in polymer mixturesPhysical Review Letters, 1994
- Structure of Membrane Surfactant and Liquid Crystalline Smectic Lamellar Phases Under FlowScience, 1993
- Shear-induced isotropic-to-lamellar transitionPhysical Review Letters, 1993
- Enhanced concentration fluctuations in polymer solutions under shear flowPhysical Review Letters, 1991
- Shear-Induced MeltingPhysical Review Letters, 1981