Influence of fiber orientation and length distribution on the rheological characterization of glass-fiber-filled polypropylene
Publikation
Outline
T. Köpplmayr, I. Milosavljevic, M. Aigner, R. Hasslacher, B. Plank, D. Salaberger, J. Miethlinger - Influence of fiber orientation and length distribution on the rheological characterization of glass-fiber-filled polypropylene - POLYMER TESTING, Vol. 31, No. 3, 2013, pp. 535-544
Abstract
We report on the characterization of glass-fiber-filled polypropylene compounds identified
by means of rotational rheometry in parallel plate mode. The small gap between the plates
and the length of the glass fibers cause considerable wall and initial orientation effects,
which we minimized by applying various degrees of pre-shearing, optimizing both
duration and level of shear deformation. The results were verified using X-ray computed
tomography to investigate the dispersion of glass fibers in the melt. In addition, extrusion
experiments confirm the validity of our results
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