Advanced short fiber composites with hybrid reinforcement and selective fiber-matrix-adhesion based on polypropylene – Characterization of mechanical properties and fiber orientation using high-resolution X-ray tomography. (August 2018)

• Record Type: Journal Article
• Authors: Kahl, C.; Feldmann, M.; Sälzer, P.; Heim, H.-P.
• Is Part Of: Composites. Volume 111(2018)
• Page Start: 54
• Page End: 61
• Publication Date: 2018-08
• Subjects: A. Hybrid -- A. Cellulose -- A. Glass fibers -- D. CT analysis -- D. Material testing; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2018.05.014
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: Composites with two types of reinforcement fibers open a large field of opportunities and combine properties. Glass fibers lead to higher strength and modulus, but they provide a brittle character. In contrast to this, man-made cellulose fiber composites show higher energy absorption and higher elongation-at-break. The aim of this study is to investigate the synergy of those two fiber types in a hybrid compound. Compounds with an overall fiber content of 16 vol% and different ratios of glass and man-made cellulose fibers were prepared with a twin-screw extruder and injection molded to test specimen. Mechanical properties as well as the composite morphology were studied for compounds with selective fiber-matrix-adhesion and without a coupling agent. A bimodal fiber length distribution was found in the hybrid compounds due to the different shortened fiber types. The long man-made cellulose fibers increase the impact strength and influences the fiber orientation in the hybrid.