主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (11): 1573-1576.

• • 上一篇    下一篇

可膨胀石墨对改性硅橡胶膨胀及燃烧性能的影响

李建华   

  1. 中国人民警察大学警务装备技术学院，河北廊坊065000
  • 出版日期:2020-11-15 发布日期:2020-11-15
  • 作者简介:李建华(1979—)，男，河北易县人，中国人民警察大学警务装备技术学院副教授，博士，主要从事材料阻燃性能研究，河北省廊坊市西昌路220 号，065000。
  • 基金资助:
    中国人民警察大学中青年教师科研创新计划项目（ZQN2018009）；中国博士后科学基金项目（2016M591050）

Effect of expandable graphite on expansion and combustion performance of modified silicone rubber

LI Jian-hua   

  1. College of Police Equipment Technology, China People's Police University, Hebei Langfang 065000，China

  • Online:2020-11-15 Published:2020-11-15

摘要： 硅橡胶是有机-无机材料，是一种优良的阻燃材料，在许多领域得到应用，硅橡胶膨胀化后可以扩大其在高端制造和动力电缆防护领域的应用。以可膨胀石墨为膨胀阻燃剂，添加不同含量次磷酸铝制备膨胀硅橡胶材料，研究了硅橡胶的膨胀阻燃性能。采用氧指数（LOI）、垂直燃烧测试（UL-94）、热失重分析（TGA）、膨胀测试、力学性能等手段对其进行了研究。结果表明：次磷酸铝和可膨胀石墨为1:1 时，LOI 达到40.8%，UL-94 达到V-0 等级，力学性能也达到了最佳，从锥量结果看，二者复配时pHRR 从455 kW/m2 降低到259 kW/m2，且膨胀效果好，炭层强度增强。

关键词: 复合材料, 高温硫化硅橡胶, 膨胀阻燃, 可膨胀石墨, 次磷酸铝

Abstract: Silicone rubber is an organic-inorganic material, and is an excellent flame retardant material, which has been applied in many fields. After expansion, silicone rubber can expand its application in high- end manufacturing and power cable protection.The intumescent flame retardancy of silicone rubber was studied by using expandable graphite as intumescent flame retardant and adding different content of aluminum hypophosphite.The characteristics were investigated by oxygen index, vertical combustion UL-94, thermal analysis, tensile and volume change tests. The results show that the silicone rubber is the UL-94 V-0 grade while the additive content is 1:1, and the oxygen index can be up to 40.8%, what's more, mechanical properties have reached the best. From the cone measurement results, when the two were mixed, the PHRR decreased from 455 kW/m2 to 250 kW/m2 ,with good expansion effect and the carbon layer strong strength.

Key words: composite; high temperature vulcanized siliconerubber, intumescent flame retardant；expandable graphite；aluminumhypophosphite