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Flammability and thermal analysis of thermoplastic polyurethane/DOPO derivative/sepiolite composites

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Abstract

Thermoplastic polyurethane was an important polymer and widely used in many fields. However, poor fire performance significantly inhibits its further application. In this study, the flammability, thermal and mechanical properties of thermoplastic polyurethane (TPU)/DOPO derivative (DiDOPO)/sepiolite composites, fabricated by a melt blending process, were examined based on the sepiolite content. TPUSEP3 has achieved UL-94 V0 classes and LOI 34.4%. Micro-scale combustion calorimeter shows that TPU/DiDOPO/sepiolite composites possess an excellent fire performance. Flexural strength of TPUSEP3 has enhanced to 48.3 MPa which indicated the rigidity of composites has significantly improved. In addition, the scanning electronic microscopy images of the external surface of the carbon layer of composites show a very compact structure. Sepiolite and DiDOPO change the decomposition process of composites lead to the decrease of Ea values of TPU/DiDOPO/sepiolite composites.

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Acknowledgements

We gratefully acknowledge the financial supports by Science and Technology Project of Guizhou (2019/2026), Fundamental Research Key Project of Guizhou Province (NO. 20201Z044), The Guizhou Science Fund for Excellent Young Scholars (20195665), Open Fund Program of Southwest University of Science and Technology (No. 18zxgk01).

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Authors and Affiliations

  1. College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

    Ying Zhou, Min He, Lan Xie, Weidi He, Shuhao Qin & Jianbing Guo

  2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China

    Ying Zhou, Lan Xie, Weidi He, Dinghong Xu, Hongming Wu, Shuhao Qin & Jianbing Guo

  3. Fundamental Department, Army Logistics University of PLA, Chongqing, 401311, China

    Guangqiang Xiao

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  1. Ying Zhou
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Zhou, Y., He, M., Xie, L. et al. Flammability and thermal analysis of thermoplastic polyurethane/DOPO derivative/sepiolite composites. J Therm Anal Calorim 147, 8225–8234 (2022). https://doi.org/10.1007/s10973-021-11105-6

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  • DOI: https://doi.org/10.1007/s10973-021-11105-6

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