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A. Kloziński, P. Jakubowska, J. E. Przybylska, R. Przekop

Application of in-line rheological measurements for characterization
ofpolypropylene/opoka rock powder composites (in English)

Polimery 2019, No 4, 282


DOI: dx.doi.org/10.14314/polimery.2019.4.6

Summary

The rheological properties of the composites of polypropylene (PP) with a new natural powder hybrid filler – carbonate-silicate rock called opoka – were investigated. Opoka rock isindustrial waste originating (as a subsieve fraction) from the production of sorbents used in water treatment processes. The effect of opoka addition (1, 5and 10 wt %) on the processability of PP was determined during the extrusion process using an in-line measuring stand. The testing instrument was anex truder rheometer equipped with a rheological measuring head with exchangeable dies. Cylindrical measuring dies with a radius of 1.5 mm and a length of L = 20, 30, 40 and 50 mm, respectively, were used in the measurements. The rheological parameters of the composites were determined based on the Ostwald-de-Waele power-law model at a temperature of 230 °C. The effect of the addition of opoka on the extruder operating cha­racteristic, flow curves, viscosity curves, and the values of power law index (n), consistency factor (K), mass flow rate (MFR) and volume flow rate (MVR) have been determined.


Keywords: polypropylene, polymer composites, opoka, powder filler, natural filler, hybrid filler, in-line rheology, viscosity, viscosity curve
e-mail: Arkadiusz.Klozinski@put.poznan.pl

A. Kloziński, P. Jakubowska, J. E. Przybylska, R. Przekop
Application of in-line rheological measurements for characterization of polypropylene/opoka rock powder composites (in English)