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Investigating the Effect of Photo-Oxidative Degradation on the Ageing Resistance of the Car Mudflaps Manufactured with Post-Production High-Density Polyethylene Wastes
Summary
Automotive mudflaps made from recycled high-density polyethylene were subjected to accelerated aging tests to assess their durability. The study measured changes in mechanical properties including tensile strength, impact toughness, and hardness after UV and thermal aging. Results show that recycled plastic can maintain acceptable performance in automotive applications, supporting circular economy goals.
The paper presents the results of the ageing resistance of automotive mudfl aps made of recycled polyethylene blends. The mudfl aps were manufactured by a plastic sheet extrusion-calendaring process in Novotech Kostrzyn nad Odr company. The changes of the mechanical properties in the tensile test and impact toughness test as well as in Shore hardness due to the accelerated aging process were characterized, taking into account the aging sensitivity coeffi cient (KI), and changes in the structure within the wavenumber range 4000-400 cm -1 , taking into account the CI coeffi cient. The results showed a higher melting point and crystallinity for the recycled HDPE blends during photo-oxidative degradation. Moreover, the results presented decreased tensile strength and ductility, due to macromolecular chain scission caused by oxidation. It was found that the blends of HDPE based on recycled materials are more sensitive to the aging process than virgin HDPE. Finally, it can be concluded that the sensitivity to ageing blends increases with the increase of recycled HDPE content in the HDPE matrix.
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