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The properties of flame retardant and heat conduction polyamide 66 based on melamine cyanurate/aluminum diethylphosphinate/graphene

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Abstract

In this present paper, melamine cyanurate (MCA)/aluminum diethylphosphinate (AlPi) were used as composite flame retardants, and with addition of graphene (Gr) served as thermal conductive filler for preparing flame-retardant and thermal conductive polyamide 66 (PA66). The effects of Gr on flame retardancy, as well as the thermal conductivity on the combustion behavior of PA66 under the heat environment were investigated. The results demonstrated that Gr could effectively inhibit phosphorus-containing radicals from AlPi into gaseous phase and improve its impact on the condensed phase. Additionally, as a physical carbon source, two-dimensional sheets of Gr provide excellent barrier shielding effects and increase the residue, thus significantly retarding the melt drops during the combustion process. The results showed that the specimens with 12 wt% composite flame retardants and 3.5 wt% Gr, passed UL-94 V-0 rating (1.6 mm of thickness) and the total heat release (THR) were decreased by 22% according to micro-scale combustion calorimetry (MCC). Additionally, the improved thermal conductivity due to the addition of Gr, effectively enhances the thermal heat dissipation rate and decreases the risk of self-ignition caused by local heat accumulation.

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Acknowledgements

The authors acknowledge the financial support from the National Key Research and Development Program of China (2017YFB0309001), NSAF Fund (U183010085), and the Open project of Sichuan Provincial Key Lab of Process Equipment and Control (GK201711),Sichuan Science and Technology Project (No.2019YFSY0011) .

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Authors and Affiliations

  1. The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, Sichuan, China

    Dian Luo, Yuan Liu & Qi Wang

  2. Sichuan Provincial Key Lab of Process Equipment and Control, Sichuan University of Science & Engineering, Zigong, 643000, China

    Yan Shi

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  1. Dian Luo
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  2. Yuan Liu
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  3. Yan Shi
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  4. Qi Wang
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Correspondence to Yuan Liu.

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Luo, D., Liu, Y., Shi, Y. et al. The properties of flame retardant and heat conduction polyamide 66 based on melamine cyanurate/aluminum diethylphosphinate/graphene. J Polym Res 26, 216 (2019). https://doi.org/10.1007/s10965-019-1866-6

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  • DOI: https://doi.org/10.1007/s10965-019-1866-6

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