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The synergetic effect of antimony (Sb2O3) and melamine cyanurate (MCA) on the flame-retardant behavior of silicon rubber

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Abstract

The silicone rubber composites with antimony trioxide (Sb2O3) and melamine cyanurate (MCA) additive were fabricated. The results of scanning electron microscope are shown that the Sb2O3 and MCA are uniformly dispersed into the silicone rubber (SR). It was found that tensile strength and elongation at break were down to 300% and 5.3 MPa with the increase in MCA content. The flammability of the composite was also studied by limiting oxygen index (LOI) and cone calorimetry test. The results indicated that a 31.5% LOI of the composite was achieved, and the heat release rate and total heat release values of the composite with MCA were apparently reduced compared to that without MCA. Meantime, the retention of elongation and tensile strength keeps good behavior. The time to ignition of the composite with MCA is belonged. The results show that the microstructure of combustion residue of MCA additive is continuous and smooth, and it is a good barrier to isolate combustible gas and oxygen. All these test results demonstrated that the synergistic effect of Sb2O3 and MCA successfully enhanced the flame-retardant properties of the SR composite.

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Acknowledgements

This work was supported by Controllable preparation of graphene hydrogel loaded nano-zero-valent iron and removal of chlorophenol pollutants from groundwater [NSFC (2019) No. 27].

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Correspondence to Xuezheng Huang.

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Huang, X., Tian, Z., Zhang, D. et al. The synergetic effect of antimony (Sb2O3) and melamine cyanurate (MCA) on the flame-retardant behavior of silicon rubber. Polym. Bull. (2020). https://doi.org/10.1007/s00289-019-03098-y

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Keywords

  • Silicone rubber
  • MCA additive
  • Sb2O3
  • Flammability
  • Synergistic effect