Analysis of the Influence of Aramid Pulp on the Combustion Behavior of Intumescent Flame-retardant Polyurea

Ying Hou; Ya-ru Sun; Jun Wang; Chao Liu; Yan Liu; Feng-lei Huang

doi:10.11777/j.issn1000-3304.2025.25178

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Analysis of the Influence of Aramid Pulp on the Combustion Behavior of Intumescent Flame-retardant Polyurea

Research Article | 更新时间：2026-03-23

- Analysis of the Influence of Aramid Pulp on the Combustion Behavior of Intumescent Flame-retardant Polyurea
- Acta Polymerica Sinica Vol. 57, Issue 3, Pages: 794-806(2026)
- 作者机构：
  
  1.北京理工大学爆炸科学与安全防护全国重点实验室北京 100081
  2.北京理工大学重庆创新中心智能毁伤评估技术研究所重庆 401120
  3.湖北航天江河化工有限公司宜昌 444200
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25178
  CLC：
- CSTR：32057.14.GFZXB.2025.7527
- Received：24 November 2025，
  
  Accepted：11 December 2025，
  
  Online First：27 January 2026，
  
  Published：20 March 2026
- 稿件说明：
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侯迎, 孙亚如, 王军, 刘超, 刘彦, 黄风雷. 芳纶浆粕对膨胀阻燃聚脲的燃烧行为影响分析. 高分子学报, 2026, 57(3), 794-806.

Hou, Y.; Sun, Y. R.; Wang, J.; Liu, C.; Liu, Y.; Huang, F. L. Analysis of the influence of aramid pulp on the combustion behavior of intumescent flame-retardant polyurea. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 794-806.
侯迎, 孙亚如, 王军, 刘超, 刘彦, 黄风雷. 芳纶浆粕对膨胀阻燃聚脲的燃烧行为影响分析. 高分子学报, 2026, 57(3), 794-806. DOI： 10.11777/j.issn1000-3304.2025.25178. CSTR： 32057.14.GFZXB.2025.7527.

Hou, Y.; Sun, Y. R.; Wang, J.; Liu, C.; Liu, Y.; Huang, F. L. Analysis of the influence of aramid pulp on the combustion behavior of intumescent flame-retardant polyurea. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 794-806. DOI： 10.11777/j.issn1000-3304.2025.25178. CSTR： 32057.14.GFZXB.2025.7527.

摘要

针对弹药在热冲击环境下的防护需求，本研究通过芳纶浆粕(AF)协效膨胀阻燃剂改性聚脲(PUA)，系统研究了AF对膨胀阻燃聚脲的特定阻燃性能影响及作用机制. 结果表明，相较于普通膨胀阻燃聚脲复合材料，添加AF的复合材料具有更低的极限氧指数(LOI)值和在微型量热测试中更高的热释放速率；而在锥形量热和氧乙炔测试中，添加低含量AF (0.5 wt%和1.0 wt%)可以进一步降低热释放并显著提高材料的耐烧蚀性能. 本研究针对PUA这一特定燃烧行为现象提出的合理解释，将有助于进一步发展一维材料的阻燃机理及其在安全弹药绝热涂层领域的应用.

Abstract

In response to the thermal protection requirements of ammunition under extreme thermal shock conditions

this study systematically investigated the effects of aramid pulp (AF) on the specific thermal protection properties of intumescent flame-retardant polyurea (PUA) by modifying PUA with AF in combination with an intumescent flame retardant. The results indicated that

compared with conventional intumescent flame-retardant PUA composites

the composites incorporating AF exhibited a lower limiting oxygen index (LOI) and a higher heat release rate in the microscale combustion calorimeter (MCC) test. However

in the cone calorimeter and oxyacetylene ablation tests

the addition of low levels of AF (0.5 wt% and 1.0 wt%) further reduced the heat release and significantly enhanced the ablation resistance of the materials. The rational explanation proposed in this paper for this specific thermal protection phenomenon will contribute to the further development of the flame-retardant mechanisms of one-dimensional materials and their applications in the field of thermal protection coatings for safe ammunition.

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Keywords

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