Influence of injection moulding condition and annealing on thermal properties, structure, color and gloss of composite polyamide 6 with glass beads
Adam Gnatowski
Quarterly No. 2, 2012 pages 115-120
DOI:
keywords: composites, thermal properties, structure, colour, gloss, polyamide 6, glass beads
abstract Determination of the influence of processing and annealing on the change of thermal properties, structure, color and gloss for samples made of a polyamide 6 composite with glass beads was the aim of this work. Investigation of the crystallinity degree using the DSC method as well as investigation of the structure using optical microscopy have been made. The color change was determined by the CIELab method and the gloss by reflection at the angles of 20 and 60°. Investigations into the influence of the conditions of injection moulding on the properties of the PA 6 composite with glass beads, commercial name of Schulnamid 6 GB30H, have been conducted. The samples were injected using a KraussMaffei KM65-160C1 injection moulding machine. Investigations have been conducted for the samples before as well as after annealing. The highest value of the crystallization degree of the PA 6/glass beads composite was obtained at an injection temperature of 280°C and mold temperature of 100°C. During annealing, an increase in the crystalline phase content for the PA 6 composite with glass beads occurred. The increase in the lightness value after the annealing process of PA 6 filled with glass beads was obtained. The character of changes of the a* and b* coordinate values for the examined materials before and after the annealing process was evaluated, which proves the essential influence of the conditions of injection moulding and thermal treatment on the colour change.