Characterization of self‐reinforced polyethylene recyclates according to different valorization strategies

Abstract

AbstractIn the context of the energy transition, especially in the automotive and aerospace fields, specific attention must be paid to energy consumption and carbon footprint reduction throughout the life cycle of parts. Composites such as self‐reinforced polymers (SRPs) appear as an interesting alternative by combining the components' lightness, mechanical strength, and similar chemical nature. This last point makes recycling possible without any costly separation step of the constituents. The literature has widely reported the easy recyclability of SRP as a development driver. However, few studies analyze it in detail. The feasibility of reprocessing by mechanical grinding a self‐reinforced polyethylene (SRPE) is then examined to view two valorization routes. The impact of the thermomechanical history undergone before recycling, the grinding, the nature of the shreds, and the reprocessing conditions, on the behavior of the recyclates is studied, in parallel with physical considerations, for one reprocessing cycle. The results obtained show that SRPE can be mechanically recycled and keep interesting mechanical properties whatever its reuse.