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Toughness Improvement of Epoxy Composites Using a Kind of Environment-Friendly Bio-Based Polyester Polyol

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Abstract

Epoxy resin (EP) is a thermosetting resin with prominent performances and wide applications. However, the inherent brittleness limits its development in the engineering materials area. A liquid bio-based polyester polyol (LLP) with flexible long chains was synthesized in this study by melt polycondensation of corn straw lignin. After being compounded with EP (LLP/EP), the mechanical property, micromorphology and thermal behavior of the composite were evaluated. The experimental result indicated that the fracture brittleness of EP composite was decreased by importing the LLP. The bending and impact strength were up to 113.67 MPa and 51.29 kJ/m2 for 10%-LLP/EP, which were 5.25% and 27% higher than those of unmodified EP. The results of this work build new avenues for the efficient utilization of lignin and the development of low-cost, high-performance and well environmentally adaptable EP composite by renewable resources.

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Acknowledgements

This work was supported by the Foundation of “Special Project for Double First-Class-Cultivation of Innovative Talents” from Northeast Forestry University [No. 000/41113102] and the National Natural Science Foundation of China [No. 32071692]. Special thanks for the support of the Chinese University Students' Innovation and Entrepreneurship Project [No. CL202110].

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Authors and Affiliations

  1. Key Laboratory of Bio-Based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin, 150040, China

    Xinyu Shang, Lei Xue & Yanhua Zhang

  2. Engineering Research Center of Advanced Wooden Materials (Northeast Forestry University), Ministry of Education, Harbin, 150040, China

    Xinyu Shang, Lei Xue & Yanhua Zhang

Authors
  1. Xinyu Shang
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  2. Lei Xue
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  3. Yanhua Zhang
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Contributions

XS: applies oneself to writing-original drafts. LX: applies oneself to the investigation. YZ: applies oneself to the conceptualization and writing-review & editing.

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Correspondence to Yanhua Zhang.

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Shang, X., Xue, L. & Zhang, Y. Toughness Improvement of Epoxy Composites Using a Kind of Environment-Friendly Bio-Based Polyester Polyol. J Polym Environ 30, 4492–4499 (2022). https://doi.org/10.1007/s10924-022-02470-w

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  • DOI: https://doi.org/10.1007/s10924-022-02470-w

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