This study assessed the life cycle of biocomposites with antioxidants by repeated processing. The effects of antioxidants on the life cycle of wood flour/polypropylene (PP) composites were determined by analyzing their mechanical and thermal properties. The composites were repeatedly processed for seven times with pelletizing and extruding. An antioxidant, pentaerythritoltetrakys 3-(3,5-ditert-butyl-4-hydroxyphenyl) propionate, was used. The mechanical strength of the biocomposites decreased after reprocessing. Fourier transformed infrared analysis showed that thermo-oxidative aging occurred during reprocessing. The thermal performance of the resulting composites decreased because of reprocessing. Wood flour/PP has a long lifetime and antioxidants can slow the thermo-oxidative and mechanical degradation during reprocessing.
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Project funding: This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2572018BB07) and the National Natural Science Foundation of China (Grant No. 31670570).
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Corresponding editor: Yu Lei.
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Wang, H., Zhang, J., Fu, H. et al. Effect of an antioxidant on the life cycle of wood flour/polypropylene composites. J. For. Res. 31, 1435–1443 (2020). https://doi.org/10.1007/s11676-019-00898-w
- Wood-plastic composites