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Flame retardant effect of 1-aminoethyl-3-methylimidazolium hexafluorophosphate in thermoplastic polyurethane elastomer

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Abstract

In this paper, 1-aminoethyl-3-methylimidazolium hexafluorophosphate ([APMIm]PF6) and 1-butyl-3-methylimidazolium hexafluorophosphate ([EMIM]PF6) were used as flame retardant additives in thermoplastic polyurethane elastomer (TPU). The flame retardant effect of [APMIm]PF6 and [EMIM]PF6 in TPU had been investigated by cone calorimeter (CCT), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), microcombustion calorimeter (MCC), fourier transform infrared spectroscopy (FT-IR), smoke density test (SDT), thermogravimetric analysis (TG) and thermogravimetric/fourier transform infared spectroscopy (TG-IR), respectively. The results indicated that TPU/[APMIm]PF6 had better thermal properties compared with pure TPU and TPU/[EMIM]PF6. The peak heat release rate (pHRR) of TPU/A-1.0 was remarkably reduced by 32.97% and 19.15%, in comparison with that of TPU and TPU/E-1.0. Moreover, the total heat release (THR) and smoke production rate (SPR) of TPU/A-1.0 were the lowest among all samples. And, in the early stage of fire, [APMIm]PF6 can promote the formation of protective carbon layer, reduce the HRR and SPR. Therefore, it is necessary to develop environment-friendly green flame retardants.

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Acknowledgements

The authors gratefully acknowledge the National Natural Science Foundation of China (No. 51776101), the Natural Science Foundation of Shandong Province (ZR2017MB016), and the Project of the State Administration of Work Safety (Shandong-0039-2017AQ).

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Authors and Affiliations

  1. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, Shandong, People’s Republic of China

    Chuanmei Jiao, Yanli Zhang, Shaoxiang Li & Xilei Chen

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  1. Chuanmei Jiao
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  2. Yanli Zhang
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Jiao, C., Zhang, Y., Li, S. et al. Flame retardant effect of 1-aminoethyl-3-methylimidazolium hexafluorophosphate in thermoplastic polyurethane elastomer. J Therm Anal Calorim 145, 173–184 (2021). https://doi.org/10.1007/s10973-020-09671-2

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