Flammability Characterization and Effects of Magnesium Oxide in Halogen-free Flame-retardant EVA Blends

Yan Zhang; Rui-qun Peng; Guang-da Zhou; Zheng-ping Fang; Xiao-nan Li

doi:10.1007/s10118-015-1722-z

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Flammability Characterization and Effects of Magnesium Oxide in Halogen-free Flame-retardant EVA Blends

PAPER | Updated：2021-06-21

- Flammability Characterization and Effects of Magnesium Oxide in Halogen-free Flame-retardant EVA Blends
- Chinese Journal of Polymer Science Vol. 33, Issue 12, Pages: 1683-1690(2015)
- Affiliations：
  
  a.Lab of Polymer Materials and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
  b.Hangzhou First PV Material Co., Ltd., Hangzhou 311300, China
  c.MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  **Guang-da Zhou (周光大), E-mail: fstzgd@126.com
- Funds：
- DOI：10.1007/s10118-015-1722-z
  CLC：
- Received：13 May 2015，
  
  Revised：2015-07-23，
  
  Accepted：24 July 2015，
  
  Published：2015-12
- Accepted：
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Yan Zhang, Rui-qun Peng, Guang-da Zhou, et al. Flammability Characterization and Effects of Magnesium Oxide in Halogen-free Flame-retardant EVA Blends[J]. Chinese Journal of Polymer Science, 2015, 33(12): 1683-1690.
DOI：

Yan Zhang, Rui-qun Peng, Guang-da Zhou, et al. Flammability Characterization and Effects of Magnesium Oxide in Halogen-free Flame-retardant EVA Blends[J]. Chinese Journal of Polymer Science, 2015, 33(12): 1683-1690. DOI： 10.1007/s10118-015-1722-z.

摘要

Abstract

The effects of magnesium oxide (MgO) on the flame retardant performance of intumescent systems based on ammonium polyphosphate (APP) and pentaerythritol (PER) in ethylene vinyl acetate copolymer (EVA) were studied. The results showed that MgO affects both the quality and quantity of residual char. There is an optimal value for the loading amount of MgO. More or less MgO loading may cause the formation of defective char layers and worsen the flame retardancy of EVA. According to the results of limiting oxygen index (LOI)

vertical flammability test (UL94 rating) and cone calorimetry (CONE)

the best flame retardancy with a strong and well intumescent char is obtained from the sample with 1 wt% of MgO

which has the highest LOI value of 27.9

UL94 rating of V-0 and the lowest peak heat release rate of 242 kW·m

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