Construction of hierarchical structure of carbon nanotube-encapsulated ammonium polyphosphate/Mg(OH)<sub>2</sub> and the synergistic effect on the fire safety of ethylene-vinyl acetate copolymer

LI Zhuoshi; LU Jingyi; DONG Chun; WANG Bibo; JIN Zhijian; FANG Quansheng; HU Yuan

doi:10.13801/j.cnki.fhclxb.20210312.006

Volume 39 Issue 1

Jan. 2022

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Article Navigation > Acta Materiae Compositae Sinica > 2022 > 39(1): 182-192

LI Zhuoshi, LU Jingyi, DONG Chun, et al. Construction of hierarchical structure of carbon nanotube-encapsulated ammonium polyphosphate/Mg(OH)2 and the synergistic effect on the fire safety of ethylene-vinyl acetate copolymer[J]. Acta Materiae Compositae Sinica, 2022, 39(1): 182-192. doi: 10.13801/j.cnki.fhclxb.20210312.006

Citation:

LI Zhuoshi, LU Jingyi, DONG Chun, et al. Construction of hierarchical structure of carbon nanotube-encapsulated ammonium polyphosphate/Mg(OH)₂ and the synergistic effect on the fire safety of ethylene-vinyl acetate copolymer[J]. Acta Materiae Compositae Sinica, 2022, 39(1): 182-192. doi: 10.13801/j.cnki.fhclxb.20210312.006

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Construction of hierarchical structure of carbon nanotube-encapsulated ammonium polyphosphate/Mg(OH)₂ and the synergistic effect on the fire safety of ethylene-vinyl acetate copolymer

doi: 10.13801/j.cnki.fhclxb.20210312.006

1.
Baosheng Science & Technology CO. LTD., Yangzhou 225800, China
2.
University of Science and Technology of China, Hefei 230026, China

Received Date: 2021-01-20
Accepted Date: 2021-03-01
Rev Recd Date: 2021-02-11

Available Online: 2021-03-12

Publish Date: 2022-01-15

Abstract

Abstract

In this paper, a hierarchical structure of carbon nanotube-encapsulated ammonium polyphosphate (APP@CNT) flame retardant was synthesized, and Mg(OH)₂ was used in conjunction with nano-composite technology to prepare fire-safe wire and cable flame-retardant ethylene-vinyl acetate copolymer (EVA) composite material (APP@CNT/EVA-Mg(OH)₂). The structure and performance of flame-retardant ethylene-vinyl acetate composite materials were studied by using SEM, TGA, limiting oxygen index (LOI), vertical combustion (UL-94), microscale combustion colorimeter (MCC), universal stretching machine and high resistance meter. The results show that the residual carbon rate of EVA increases from 2.4% to 43.9%, the peak heat release decreases by 57.85% compared with pure EVA, the total heat release decreases by 57.80%, and the yield strength increases by 408%. At the same time, the volume resistivity of APP@CNT/EVA-Mg(OH)₂ is still as high as 3.9×10¹⁵ Ω·cm, indicating that the EVA composite material after flame retardant treatment is still an ideal wire and cable material. In addition, the oxygen index of APP@CNT/EVA-Mg(OH)₂ has reached 38%, and the vertical combustion UL-94 has also reached the V-0 level, which further illustrates the hierarchical structure of APP@CNT and magnesium hydroxide. Flame-retardant ethylene-vinyl acetate composite material has high fire safety performance.
- ethylene-vinyl acetate,
- carbon nanotube,
- hierarchical structure,
- flame retardant,
- synergistic effect
Long Abstrsct
Innovation Points

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References(34)

References

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