Physical properties of polyoxymethylene composite with quartz sand after UV ageing
Adam Gnatowski
Quarterly No. 2, 2013 pages 147-151
DOI:
keywords: composites, thermal properties, tensile strength, color, gloss, polyoxymethylene, quartz sand
abstract The results of examinations of polyoxymethylene (Tarnoform) with quartz sand composites are presented. Investigations were made for composites with quartz sand covered with a 20% type A 1100 aminosilane water solution. A composite with a 30% filler content was made using an extrusion machine collaborating with a granulator. Composites of lower filler contents (10 and 20%) were made by the addition of a proper amount of Tarnoform to the 30% composite. The samples for the examinations were made using a KraussMaffei KM65-160C1 screw injection moulding machine. Investigations were conducted on the samples before as well as after UV ageing. Investigation of the mechanical properties: tensile strength and hardness were made, and also the thermal properties, gloss and color were determined. The aim of the investigations is to determine the influence of the filler and UV ageing on the composite properties and to receive a new, cheaper constructional material. The lowest value of melting enthalpy of the POM/ quartz sand composite was obtained from samples after UV ageing. An increase in the lightness value after the ageing process of POM filled with quartz sand was obtained. The character of the changes of the a* and b* coordinate values for the examined materials before and after the ageing process was evaluated, which proves the essential influence of the filler addition on the colour change. The tensile strength of the composite decreases, while the hardness increases as the content of quartz sand increases both before and after the ageing process.