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Polyphosphazene-wrapped Fe–MOF for improving flame retardancy and smoke suppression of epoxy resins

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Abstract

A novel polyphosphazene (PZS)-wrapped iron 2-methylimidazole metal–organic framework (PZS–Fe–MOF) hybrid with rich N, P, and Fe elements is synthesized, which is incorporated into epoxy resin (EP) to prepare EP/PZS–Fe–MOF composites for improving flame retardancy and smoke suppression of EP via synergistic effect. The results indicate that PZS–Fe–MOF significantly enhances the flame retardant and smoke suppression performances of EP composites. Compared with pure EP, with the addition of 1 mass% PZS–Fe–MOF, the LOI value is increased from 32.3 to 25.8% and EP/1 mass% PZS–Fe–MOF composites pass V-1 rating. Compared with pure EP, the peak heat release rate, total heat release, smoke production rate, and total smoke production of EP/3 mass% PZS–Fe–MOF composites are decreased by 30.2%, 36.9%, 36.6%, and 41.4%, respectively. The results indicate that the improved flame retardancy and smoke suppression are mainly attributed to that the synergistic effect between PZS and Fe-MOF, promoting the formation of compact carbonaceous ceramic layer, which can restrain heat and mass transfer between EP composites and flame zone.

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Acknowledgements

This research is funded by the National Natural Science Foundation of China (51603091) and Zhenjiang 2019 Cable Fire Protection Enhancement Special Consultation Project (HYDL-ZJ-201903-01-079).

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Authors and Affiliations

  1. Zhenjiang Electric Power Supply Company, State Grid Jiangsu Electric Power Co., Ltd., Zhenjiang, 212000, Jiangsu, China

    Lei Sang, Yongming Cheng, Ru Yang & Jing Li

  2. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, China

    Qinghong Kong

  3. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu, China

    Junhao Zhang

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  1. Lei Sang
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Correspondence to Qinghong Kong or Junhao Zhang.

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Ru Yang’s contribution is the formulation and implementation of experimental schemes. Qinghong Kong and Junhao Zhang put forward research ideas, revised papers, and provided research funding.

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Sang, L., Cheng, Y., Yang, R. et al. Polyphosphazene-wrapped Fe–MOF for improving flame retardancy and smoke suppression of epoxy resins. J Therm Anal Calorim 144, 51–59 (2021). https://doi.org/10.1007/s10973-020-09481-6

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  • DOI: https://doi.org/10.1007/s10973-020-09481-6

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