Rheology of Ceramic-powder-filled Polymer Melts
نویسندگان
چکیده
Ceramic powder (zirconia) was mixed with binder consisting polypropylene, paraffin and stearic acid in elastic extruder. Steady and oscillatory shear flow properties of these materials in the molten state were measured on a cone-plate rheometer; parallel superposed steady and oscillatory shear flow experiments were also carried out. Moreover, flow properties at high shear rates were measured on a capillary rheometer. The studied filled systems showed remarkable non-Newtonian behaviour and apparent yield stress. Viscoelastic properties such as storage modulus and dynamic viscosity were influenced remarkably under the superposed shear flow at low shear rate and angular frequency, and showed significantly different behaviour from unfilled and other fiber-filled systems.
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