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A. Klozinski, M. Barczewski

Comparison of off-line,on-line and in-line measuring techniques used for determining the rheological characteristics

of polyethylene composites with calcium carbonate (in English)

Polimery 2019, No 2, 83


DOI: dx.doi.org/10.14314/polimery.2019.2.1

Summary

The articlehas presented comparative tests of the rheological characteristics oflow-density polyethylene (LDPE) with an addition of calcium carbonate (CaCO3), containing 7, 14, 21 and 28 wt % of filler, respectively. The measurements were carriedout by an off-line measuring technique (using a modified dead-weight plastometer), an on-line measuring technique (with a gear pump capillary rheometer) and an in-line measuring technique (with an extruder rheometer). The rheological parameters of the polymeric materials were determined based on the Ostwald-de-Waele power-law model at a temperature of 170 °C. The effect of calcium carbonate addition on the characteristic of operation of each of the employed instruments, the flow curves, the viscosity curves, and the values ofpower-law index (n) and consistency factor (K) have been determined.


Keywords: polyethylene, calcium carbonate, off-line rheology, on-line rheology, in-line rheology, gear pump, power-law index, consistency factor, viscosity, viscosity curve
e-mail:Arkadiusz.Klozinski@put.poznan.pl
A. Klozinski, M. Barczewski (1.19 MB)
Comparison of off-line, on-line and in-line measuring techniques used for determining the rheological characteristics of polyethylene composites with calcium carbonate