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Título: | Electromagnetic and Dynamic Mechanical Properties of Epoxy and Vinylester-Based Composites Filled with Graphene Nanoplatelets |
Autor: | Marra, Fabrizio; D’Aloia, Alessandro Giuseppe; Tamburrano, Alessio; Ochando, Isabel M. CSIC; De Bellis, Giovanni; Ellis, Gary James CSIC ORCID ; Sarto, Maria Sabrina | Fecha de publicación: | 28-jul-2016 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Polymers 8(8): 272 (2016) | Resumen: | Development of epoxy or epoxy-based vinyl ester composites with improved mechanical and electromagnetic properties, filled with carbon-based nanomaterials, is of crucial interest for use in aerospace applications as radar absorbing materials at radio frequency. Numerous studies have highlighted the fact that the effective functional properties of this class of polymer composites are strongly dependent on the production process, which affects the dispersion of the nanofiller in the polymer matrix and the formation of micro-sized aggregations, degrading the final properties of the composite. The assessment of the presence of nanofiller aggregation in a composite through microscopy investigations is quite inefficient in the case of large scale applications, and in general provides local information about the aggregation state of the nanofiller rather than an effective representation of the degradation of the functional properties of the composite due to the presence of the aggregates. In this paper, we investigate the mechanical, electrical, and electromagnetic properties of thermosetting polymer composites filled with graphene nanoplatelets (GNPs). Moreover, we propose a novel approach based on measurements of the dielectric permittivity of the composite in the 8–12 GHz range in order to assess the presence of nanofiller aggregates and to estimate their average size and dimensions. | URI: | http://hdl.handle.net/10261/142092 | DOI: | 10.3390/polym8080272 | Identificadores: | doi: 10.3390/polym8080272 |
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