Abstract
Polylactic acid (PLA)/epichlorohydrin modified pinewood flour (EWF) composites were prepared with the pinewood flour modified with epichlorohydrin (EWF) by extrusion. The effects of epichlorohydrin modified pinewood flour (EWF) on the mechanical, thermal and rheological properties of the composites were investigated systemically. The results show that the tensile and impact properties of the biocomposite were increased with the increment in EWF content added in polylactic acid (PLA). The maximum tensile strength of the composites is 52.8 MPa when the content of EWF is 20%, 13 MPa higher than that of pure PLA. In addition, the maximum elongation at break is 23.2%, which is 3.5 times higher than that of pure PLA. The suitable proportion of EWF can significantly enhance the heterogeneous nucleation efficiency and crystallization rate, and improve the crystallinity. The addition of epichlorohydrin modified pine wood flour (EWF) could increase both the storage modulus and loss modulus of the composite resulting from the increased molecular entanglement and crosslinking. The PLA/EWF composite has better comprehensive properties.
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ZY: formal analysis, data curation. MZ: investigation, writing original draft, formal analysis, data curation. HW: investigation, methodology, writing-review and editing. MW: investigation.
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Yue, Z., Wang, H., Zhang, M. et al. Mechanical, thermal and rheological properties of polylactic acid (PLA)/epichlorohydrin modified pine wood flour (EWF) composites. Eur. J. Wood Prod. 80, 1111–1120 (2022). https://doi.org/10.1007/s00107-022-01810-w
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DOI: https://doi.org/10.1007/s00107-022-01810-w