Small-angle scattering of polarized light. VI. Sphere doublets at rest and during shear

Abstract : The polarized or depolarized light scattering by well-defined monodispersed sphere doublets is investigated. Two configurations of doublets are studied. In the first (at rest) the doublets are randomly oriented in a plane, in the second the doublets are oriented in a preferred direction. This is achieved by submitting a suspension of doublets to a shear flow. The scattering patterns are compared to two theoretical predictions based on simplified geometries. In the first approach, the doublet is approximated by two interpenetrating spheres scattering independently, whereas in the second, an ellipsoid geometry is used. A good qualitative comparison is obtained. However, the HV and VH patterns of a randomly dispersed suspension are not similar. The observation of the flow of a doublet suspension in shear shows that the doublets are spiraling around the vorticity axis.
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Soumis le : mardi 2 août 2011 - 16:55:52
Dernière modification le : lundi 12 novembre 2018 - 10:59:46

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Jessica Dubois, W. Fyen, Daniela Rusu, Edith Peuvrel-Disdier, Patrick Navard. Small-angle scattering of polarized light. VI. Sphere doublets at rest and during shear. Journal of Polymer Science Part B: Polymer Physics, Wiley, 1998, 36 (11), pp.Pages 2005-2013. ⟨10.1002/(SICI)1099-0488(199808)36:11<2005::AID-POLB22>3.0.CO;2-9⟩. ⟨hal-00613105⟩

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