Procedural influences on compression and injection moulded cellulose fibre-reinforced polylactide (PLA) composites: Influence of fibre loading, fibre length, fibre orientation and voids

摘要

The influence of fibre loading (20, 30, 40 mass%), fibre fineness, and the processing procedure (compressionmoulding – CM and injection moulding – IM) on the tensile and impact strength of lyocell/PLA compositeswas examined. The results revealed a significantly higher tensile and impact strength for CMcomposites compared to IM composites. An increase in strength up to a fibre loading of 40% was determinedfor CM composites, while for IM composites the highest values were measured at a fibre loading of30%. Composites were investigated for their void content, fibre orientation, fibre length and processinducedfibre damage. A better fibre/matrix adhesion and compaction of IM composites was found whilefibre orientation as well as mechanical properties of extracted fibres show no significant differencesbetween CM and IM composites. The different mechanical characteristics of CM and IM samples areattributed predominantly to the fibre aspect ratio and the distribution of voids.