Sizing effects on the interfacial shear strength of a carbon fibre reinforced two-component thermoplastic polymer. (December 2019)

• Record Type: Journal Article
• Authors: Hendlmeier, Andreas; Marinovic, Lucas I.; Al-Assafi, Salwan; Stojcevski, Filip; Henderson, Luke C.
• Is Part Of: Composites. Volume 127(2019)
• Publication Date: 2019-12
• Subjects: Carbon fibres -- Thermoplastic resin -- Adhesion -- Fibre/matrix bond; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2019.105622
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: Here carbon fibre surface treatment conditions (current, bath conductivity, and sizing) gave a comprehensive set of 27 unique carbon fibre samples. Examination of the interfacial shear strength (IFSS) in a two-component polymethyl methacrylate resin via the V-notch shear test. Epoxy-sized fibres show a strong dependence on surface treatments and were widely variable (25.6 ± 0.72 to 38.5 ± 2.69 MPa). We suggest the epoxy sizing is soluble in the methylmethacrylate monomer and is removed from the surface before complete polymerisation. Adhesion in epoxy-sized fibres seemed linked to the ratio of oxygen and nitrogen on the fibre surface (determined by XPS). Polyamide-sized fibres possessed a smaller data variation (37.3 ± 3.34 to 33.4 ± 3.18 MPa), suggesting the polyamide-sizing masks the underlying surface chemistry of the fibre induced by the variations in surface treatment. A hybrid of these two outcomes was observed with the polyurethane sized fibres (36.1 ± 2.19 to 28.8 ± 2.82 MPa), suggesting a mixture of effects observed above.