Measurement of the high rate flow properties of filled HDPE melts by capillary rheometer: Effects of the test geometry
| Autor: | Francesco Briatico-Vangosa, Francesco Baldi, Juri Ragnoli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Pressure drop
Filler (packaging) Materials science business.product_category Polymers and Plastics Rheometry Capillary action Micro-compounds Capillary rheometry Organic Chemistry Geometry Die diameter effects Polyethylene Talc chemistry.chemical_compound chemistry High-density polyethylene (HDPE) medicine Die (manufacturing) High-density polyethylene Composite material business medicine.drug |
| Popis: | Capillary rheometry was used for measurement of the high rate steady-state flow properties of micro-filled high-density polyethylene (HDPE) melts, and the effects of the test geometry were investigated. Attention was paid to the influence of the die diameter. The micro-compounds examined had the same filler content (10 vol.% in the melt state), but differed in the nature and geometry of filler (glass beads, discontinuous glass fibres and talc). A die diameter effect on the pressure drop localized at the die entrance was clearly observed for the unfilled HDPE; for the micro-filled melts, this effect was either enhanced or considerably reduced, depending on the type of filler (opposite effects were induced by glass beads and by glass fibres). A die diameter effect on the macroscopic shear viscosity response was noticed only for the melts filled with particles with relatively high aspect ratio (glass fibres and talc platelets). |
| Databáze: | OpenAIRE |
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