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Combustion behavior and thermal stability of TPU composites based on layered yttrium hydroxides and graphene oxide

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Abstract

Layered yttrium hydroxides (LYH)- and graphene oxide (GO)-supported layered yttrium hydroxides (GO–LYH) were synthesized by a co-precipitation route. The additives were characterized by X-ray diffraction and Fourier transform infrared spectra. The LYH were homogeneously dispersed on the GO sheets, demonstrated by the transmission electron microscope analysis. Composites of TPU/LYH and TPU/GO–LYH were prepared by a melt-blending method. The morphologies and structures of the composites, revealed by scanning electron microscope, ascertained that the dispersion of the GO–LYH in the TPU was better because of the strong interaction of the hydrogen bonds between oxygen-containing groups and hydroxyl groups. The fire retardancy of the TPU composites was evaluated using limiting oxygen index (LOI), cone calorimetry and thermogravimetric analysis. The TPU/LYH and TPU/GO–LYH composites, filled with 10 mass% LYH, 9 mass% GO, achieved LOI values of 24.4% and 25.3%, while there was a 67.42% and 70.88% decline of PHRR compared with pure TPU. The improved flame retardancy and smoke suppression were attributed to the physical barrier of GO and the catalytic carbonization of LYH indicated by char analysis.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51572138), the Key R & D Project of Shandong Province (Nos. 2019GSF109001, 2019CSF109080 and 2017GSF217013), the Shandong Provincial Natural Science Foundation, China (No. ZR2018BB072), the Original Innovation Project of Qingdao City (No. 19-6-2-23-cg), the Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (Nos. 2018-K09 and 2018-K43), Key Laboratory of Coastal Environmental Processes and Ecological Remediation, YICCAS (No. 2018KFJJ02) and Opening Project of Shandong Ecochemical Engineering Collaborative Innovation Center (No. XTCXQN02).

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Authors and Affiliations

  1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Yi Qian & Peng Qiao

  2. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Haoyue Han, Long Li & Haiming Zhang

  3. Qingdao University of Science and Technology Library, Qingdao, 266042, China

    Rongmin Zhao

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  1. Yi Qian
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Qian, Y., Han, H., Li, L. et al. Combustion behavior and thermal stability of TPU composites based on layered yttrium hydroxides and graphene oxide. J Therm Anal Calorim 142, 409–423 (2020). https://doi.org/10.1007/s10973-019-09181-w

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