Phase Behavior of PS/PVME/SiO2 Blends Under Oscillatory Shear Flow Field

doi:10.7503/cjcu20130454

Abstract

Abstract:

The thermodynamics of polystyrene/poly(vinyl methyl ether)(PS/PVME) blends under oscillatory shear flow field were studied in the presence of hydrophilic fumed silica nanoparticles via online optical-shear technique. Similar to that observed in steady shear flow, it was found that there also existed a critical oscillatory frequency below which shear-induced demixing(SID) behavior was found while above which shear-induced mixing(SIM) behavior was presented. The addition of silica nanoparticles improved the miscibility of composites. There existed a critical nanoparticle content above which the oscillatory shear induced mixing and the critical oscillatory frequency behavior disappeared. The behavior showed a strong dependence both on the heating rate and the blend composition.

Key words: Polystyrene/poly(vinylmethyl ether) blend, SiO₂ Nanoparticles, Oscillatory shear flow, Phase behavior

CLC Number:

O631

TrendMD:

LI Nan, HUANG Ya-Jiang, XIA Tian, YANG Qi, LI Guang-Xian. Phase Behavior of PS/PVME/SiO₂ Blends Under Oscillatory Shear Flow Field[J]. Chem. J. Chinese Universities, 2013, 34(12): 2896.

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Phase Behavior of PS/PVME/SiO₂ Blends Under Oscillatory Shear Flow Field

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