Hydrodynamic slip due to lack of molecular interfacial interactions is demonstrated rheologically as a function of molecular weight and temperature, by comparing poly(dimethyl siloxane) (PDMS) suspensions of bare and silane-treated glass spheres. The magnitude of interfacial slip between treated spheres and PDMS matrix increases with the applied stress and with the molecular weight of PDMS matrices. The onset stress for slip drops sharply with temperature and PDMS molecular weight.
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Inn et al. (1996) studied this question.
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