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<p>MPHPB was prepared from melamine, phenylphosphonic acid and boric acid, and its flame retardant effect in PE was investigated. Compared to the intermediate product (melamine phenyl hypophosphite (MPHP)), the residual char increased from 17.9% of MPHP to 41.2% of MPHPB at 800 °C. The limiting oxygen index (LOI) of PE/20% MPHPB is 23.6%, which reaches V-0 rating. After the addition of 20% MPHPB, the total heat release (THR), peak heat release rate (pK–HRR), and average effective thermal combustion rates (av–EHC) of PE decreased. Additionally, characterizations including the pyrolysis gas chromatography-mass spectrometry (Py-GC-MS), scanning electron microscopy (SEM), raman spectroscopy test (LRS) and fourier transform infrared (FT–IR) were taken to investigate the flame retardant mechanism, and the results show that MPHPB plays roles in both gas and condensed phases.</p>

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Preparation of Flame Retardant Containing Phosphorus-nitrogen-boron and Its Application in Polyethylene

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Mengchen Cong,
  • Shangkai Lu,
  • Jin Fang,
  • Junbang Liu,
  • Lianghui Ai,
  • Ping Liu

摘要

MPHPB was prepared from melamine, phenylphosphonic acid and boric acid, and its flame retardant effect in PE was investigated. Compared to the intermediate product (melamine phenyl hypophosphite (MPHP)), the residual char increased from 17.9% of MPHP to 41.2% of MPHPB at 800 °C. The limiting oxygen index (LOI) of PE/20% MPHPB is 23.6%, which reaches V-0 rating. After the addition of 20% MPHPB, the total heat release (THR), peak heat release rate (pK–HRR), and average effective thermal combustion rates (av–EHC) of PE decreased. Additionally, characterizations including the pyrolysis gas chromatography-mass spectrometry (Py-GC-MS), scanning electron microscopy (SEM), raman spectroscopy test (LRS) and fourier transform infrared (FT–IR) were taken to investigate the flame retardant mechanism, and the results show that MPHPB plays roles in both gas and condensed phases.