Abstract
From literature some representative equations have been compiled describing the influence of filler on the viscosity of polymer melts. By application of these on the experimental results obtained from GF-SAN it was found that the relative viscosity η R , i. e. the ratio of the viscosities of the filled and unfilled melt, shows a pronounced dependence on the shear rate γ but not on the shear stress τ. Defining η R with constant τ and not with constant γ (as it is usually done), an analytical approach is possible independent of γ . Further the influence of pressure, temperature and filler content on the zero-shear viscosity of filled polymer melts may be expressed by a modified Arrhenius equation.
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