Intrinsic viscosity is not effected by fillers, it is only a function of molecular weight. Hydrolysis due to insufficient drying of the chips will result in reduction of molecular weigh and thus the intrinsic viscosity. ( Ref Mark-Howink Equation)
The dynamic viscosity is effected by fillers and theoretical estimates of the increase in viscosity due to fillers can be made using the Stokes-Einstein equation. However it is more direct to measure the effect of fillers on dynamic viscosity by capillary viscometry or better by using a Rabinowich Apparatus.
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Dear all, may be it is meant the melt viscosity. If so, it increases with increasing filler loading, but great care should be considered since thermo-mechnical degradation of the polymer took place because of increased internal friction and the heat capacity of the inorganic filler, which associate in the degradation of the Matrix. My Regards
Hi,
Please see the following reference:
PROCESSING AND CHARACTERIZATION OF POLY(ETHYLENE TEREPHTHALATE) BASED COMPOSITES. doi=10.1.1.632.4447&rep=rep1&type=pdf.
With my best regards
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