摘要
以微胶囊化红磷(MRP)、氢氧化镁(MH)及可膨胀石墨(EG)为阻燃剂,采用熔融挤出法制备了多组高密度聚乙烯(PE-HD)阻燃复合材料。采用氧指数测试、垂直燃烧测试、红外光谱分析、激光拉曼光谱分析、热重-差热分析、扫描电子显微镜分析及拉伸性能测试等方法对复合材料的阻燃性能、热稳定性、力学性能和断面的微观形貌进行了研究,并探讨了阻燃机理。结果表明,单独使用EG时阻燃效果差,但将EG与MRP、MH复配使用能有效改善材料的阻燃性能;当PE-HD/MH/MRP/EG=100/35/15/5(质量份,下同)时,复合材料的氧指数为28.5%,垂直燃烧达到UL 94 V-0级,且此时复合材料的热氧分解放热量较阻燃剂单独使用时要小得多,最大放热峰也有较大的高温位移,而阻燃剂的加入对材料拉伸性能的影响并不是很大;扫描电子显微镜分析表明,EG与PE-HD基材有很好的相容性,而MRP或MH与PE-HD基材的相容性较差。
In this work, a flame retarded high-density polyethylene （PE-HD） composite containing microencapsulated red phosphorus （MRP）, magnesium hydroxide （MH）, and expandable graphite （EG） was prepared via melt extrusion, which was characterized using LOI, UL 94, FT-IR, Raman, TG-DTA, SEM, and tensile testing. The possible flame retardant mechanism in the composites was proposed. It was found that EG alone possessed poor efficiency in flame retarding. However, when combined with MRP and MH, the flame retardancy was obviously enhanced. With PE-HD/MH/MRP/EG： 100/35/15/5 in mass, the limited oxygen index of the composite was 28. 5 %, vertical firing ranked UL 94 V 0. SEM showed that PE-HD was compatible with EG, but not with MRP or MH.
出处
《中国塑料》
CAS
CSCD
北大核心
2009年第12期72-76,共5页
China Plastics
基金
江苏省高技术项目(BG2007047)
关键词
高密度聚乙烯
微胶囊化红磷
氢氧化镁
可膨胀石墨
阻燃
协同作用
high-density polyethylene
microencapsulated red phosphorus
magnesium hydroxide
expandable graphite
flame retardancy
synergistic effect
