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Rheology of highly filled polypropylene compounds: Measurement and applications
Author(s) -
Gahleitner Markus,
Bernreitner Klaus,
Knogler Bernhard,
Neißl Wolfgang
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961080111
Subject(s) - talc , rheology , polypropylene , viscoelasticity , materials science , characterization (materials science) , composite material , plateau (mathematics) , dispersion (optics) , relaxation (psychology) , polymer , viscosity , polymer science , mathematics , nanotechnology , optics , physics , psychology , mathematical analysis , social psychology
It is common knowledge among rheologists as well as polymer engineers that compounds of thermoplastics with a high volume content of mineral fillers show a viscoelastic behaviour which is significantly different from homogeneous systems. A strong nonlinearity is combined with the development of a second plateau region of the dynamic moduli at lower frequencies. This for one makes the rheological characterization of these materials more complicated, as could be shown in a round robin test, including a PP‐compound with talc. The linearity criterion has to be handled carefully to achieve comparable and representative results. However, the viscoelasticity gives access to a quick characterization method regarding dispersion quality in compounds. This can be shown for the case of PP‐talc‐compounds, where correlations between relaxation spectrum and impact strength could be developed.