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Predicting the non-newtonian viscosity of a melt of a polymer composite with a hybrid filler

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Mechanics of Composite Materials Aims and scope

Conclusions

  1. 1.

    The dependence of effective viscosity on shear rate for a melt of composites with a granular (particulate) filler or short fibers can be reliably reduced to the analogous dependence for a melt of the matrix by means of two linear coordinate transformations if one of them (along the η axis) is determined by the Mooney formula.

  2. 2.

    When a melt of a composite with a hybrid filler is regarded as a melt with a single homogeneous filler whose matrix is the polymer filled with the second component, theoretical relations are obtained that satisfactorily describe the flow curves of melts of composites with a hybrid filler.

  3. 3.

    The effect of the composition of the hybrid filler on the viscosity of the composite melt is greater, the higher the filler content. This effect changes little with shear rate.

  4. 4.

    Values of the Einstein coefficient calculated from test results for a melt filled with long fibers (ℓ/d ≈ 250) are considerably lower than the values obtained by extrapolation of established relations for short fibers.

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Authors and Affiliations

  1. Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga

    I. P. Briedis & G. G. Teteris

Authors
  1. I. P. Briedis
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  2. G. G. Teteris
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Translated from Mekhanika Kompozitnykh Materialov, No. 2, pp. 219–224, March–April, 1990.

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Briedis, I.P., Teteris, G.G. Predicting the non-newtonian viscosity of a melt of a polymer composite with a hybrid filler. Mech Compos Mater 26, 171–176 (1990). https://doi.org/10.1007/BF00612315

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  • DOI: https://doi.org/10.1007/BF00612315

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