GRAPHENE-PEEK COMPOSITES AS HIGH TEMPERATURE ADHESIVES
US Army Benet Labs Watervliet United States
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Polyetheretherketone is a widely used engineering polymer that is suitable for high-temperature applications. Graphene is a two-dimensional form of carbon nanomaterial that has been studied extensively for its mechanical, electrical and thermal properties and its use as a filler in polymer matrices. Compounding graphene into polymers can improve various properties, even at very low concentrations. In this work, we examined the incorporation of graphene nanoplatelets GnP into PEEK. We fabricated composites using melt-mixing techniques, as well as by graphene functionalization and in-situ polymerization of the PEEK. In this way, we can compare the performance of the composites by two different processing methods. The GnP-PEEK composites were characterized by DSC, TGA, and SEM. Lap-shear joints using the GnP-PEEK as the adhesive were made and mechanically tested. Results show that the weight fraction of GnP has a major effect on the strength of the joint. We aim to produce a material that functions as a reusable high-temperature, thermoplastic adhesive, which can be activated by conventional heating methods, or by microwave heating.
- Laminates and Composite Materials
- Adhesives, Seals and Binders