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Shear-induced nano-macro structural transition in a polymeric bicontinuous microemulsion | | K Krishnan
; K Almdal
; W R Burghardt
; T P Lodge
; F S Bates
; | | Date: |
27 Aug 2001 | | Journal: | Phys Rev Lett, 87 (9), 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. | | Source: | PubMed, pmid11531601 | | Services: | Forum | Review | Favorites | |
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