The aim of this work was the incorporation of three different cuttings in three thermoplastic matrices at three different loading levels and the determination of the mechanical and rheological properties of these compounds. The base polymers used were a polypropylene (PP) HC600TF (Borealis), a polystyrene (PS) 168 N (Styrolution) and a polyvinyl chloride (PVC) Decelith 65138 glasklar 0211 (Polyplast CW). The PVC is a flexible PVC, which is ready for processing and is used in the field of cable sheaths and for the production of profiles and hoses. The three fillers were prepared by hammer mill, shaker and centrifuge and had different concentrations of water/oil. By combining the polymer matrices with the three fillertypes at three different loading levels 27 compounds and three zero samples were produced and tested, regarding diverse material properties. These composites were investigated on one hand by a rotation-oscillation rheometer in cone-plate design to measure the complex viscosity. On the other hand by a rheotens investigation the elongational behavior of the melt strands was determined. The mechanical properties of the cutting compounds were determined by tensile and Charpy impact test. Other specific material data were determined by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and ignition loss measurement. In rheological aspect, the hammer mill filler could particularly mark up in combination with PP at the different loading levels. This combination of materials reduces the viscosity by up to 92 % compared to pure polypropylene. Even regarding the rheotens investigation the hammer mill filler is characterized by the smallest decrease in melt stiffness. In term of mechanical properties the Charpy impact test showed better values of the compounds with a filler content of 10 wt.-% than for pure PVC. Regarding the tensile test, the investigations of the compounds revealed in all polymer types and loading levels an increase in the elastic moduli from 4 % up to 243 % and a continuous decrease in tensile strength with increasing filler content. The conclusion of this work is, that the incorporation of cuttings is easily possible by compounding. The use of cuttings as filler in thermoplastics is by rheological and mechanical aspect recommendable. However, it is important to take care that the preparation type of the filler has a significant impact on the performance of thermoplastics.
|Translated title of the contribution||Cuttings as filler in thermoplastic polymers|
|Award date||13 Dec 2013|
|Publication status||Published - 2013|
Bibliographical noteembargoed until 16-09-2018
- drilling mud
- thermoplastic polymer
- tensile test