Rapid processing possibilities of biocomposites: microwave, ultraviolet, and e-beam
Composite components must be cured under very strict processing conditions due to the need of a reproducible resin polymerization. Currently, polyester, vinylester, and epoxy resins are cured by heat. The thermal process is the most common in this sector. The conventional thermal process through electric resistance, infrared, or oil involves energy transfer by conduction. So, thermal gradients and nonhomogeneous exothermic reaction can be produced along the thickness of the part. This produces curing variations, external–internal solidification, thermal degradation, and residual stresses related to the process. Thus, it is necessary to work at low temperatures and low heating speed. This involves large curing cycles and external–internal curing that produces the tension and the contraction of the resin, and can cause delamination and/or matrix breaking. These inconveniences have promoted the development of processes based on rapid processing technologies such as microwave radiation, ultraviolet radiation, or electron beam.
Fecha Publicación: 15/05/2018
Autor: Fita-Bravo, S. (AIMPLAS); Roig-Asensi, I. (AIMPLAS); Redondo-Foj, B. (AIMPLAS)
Referencia: Biocomposites for High-Performance Applications. Current Barriers and Future Needs Towards Industrial Development 2017, Pages 247-274