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Shear flow behavior of a dynamically symmetric polymeric bicontinuous microemulsion
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10.1122/1.2750668
/content/sor/journal/jor2/51/5/10.1122/1.2750668
http://aip.metastore.ingenta.com/content/sor/journal/jor2/51/5/10.1122/1.2750668
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Phase diagram for PEP/PBO/PEP-PBO ternary blends along the isopleth with equal volumes of the two homopolymers. The bicontinuous microemulsion channel is cutoff by a hexagonal phase at low temperatures. Experiments were conducted on the microemulsion sample containing 83% homopolymer.

Image of FIG. 2.
FIG. 2.

Schematic representation of annular cone and plate shear cell for small angle x-ray scattering. The cone angle is exaggerated in this image; the actual angle is 5°.

Image of FIG. 3.
FIG. 3.

(a) Steady-shear viscosities of the bicontinuous microemulsion normalized by the zero-shear viscosities at 110 , 115 , 120 , 125 , and . The solid and open symbols refer to data collected with increasing and decreasing rates, respectively. The zero-shear viscosities of the bicontinuous microemulsion , PEP homopolymer and PBO homopolymer are plotted in the inset as a function of temperature. (b) Critical shear rate for shear thickening and shear rate corresponding to the viscosity maximum vs temperature.

Image of FIG. 4.
FIG. 4.

First normal stress difference of the bicontinuous microemulsion at 110 , 115 , 120 , 125 , and . The solid and open data were collected with increasing and decreasing rates, respectively.

Image of FIG. 5.
FIG. 5.

Transient viscosity of the bicontinuous microemulsion on the startup of the steady shear at : , , , and .

Image of FIG. 6.
FIG. 6.

Dynamic frequency sweep data of the bicontinuous microemulsion at , at the following strains: 5% , 10% , 20% , 50% , 100% , and 200% . (a) vs ; (b) ’ and ” vs .

Image of FIG. 7.
FIG. 7.

Dynamic strain sweep data of the bicontinuous microemulsion at various frequencies : (a) 10 and (b) .

Image of FIG. 8.
FIG. 8.
Image of FIG. 9.
FIG. 9.
Image of FIG. 10.
FIG. 10.

SAXS patterns of microemulsion recovery after cessation of shear flow at : (a) 5, (b) 25, (c) 45, (d) 85, (e) 205, and (f) . The corresponding radial averages: , , , , , and , are plotted in (g), along with the radial averages before shear and during shear .

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/content/sor/journal/jor2/51/5/10.1122/1.2750668
2007-09-01
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Shear flow behavior of a dynamically symmetric polymeric bicontinuous microemulsion
http://aip.metastore.ingenta.com/content/sor/journal/jor2/51/5/10.1122/1.2750668
10.1122/1.2750668
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