摘要
采用燃烧性能测试、热重分析、扫描电镜和力学性能测试等手段,分别研究了氢氧化镧对聚丙烯/磷酸密胺盐/季戊四醇(PP/MP/PER)复合材料阻燃性能和力学性能的影响。结果表明,添加氢氧化镧的PP/MP/PER复合材料的垂直燃烧指数均达到V0级别,当氢氧化镧添加量为0.5%(质量分数,下同)时,复合材料的极限氧指数可达33.0%,说明氢氧化镧能在一定程度上提高了PP的阻燃性能,是一种有效的阻燃协效剂。这可能是因为膨胀阻燃PP体系在燃烧过程中,氢氧化镧可与膨胀型阻燃剂反应形成网状结构、提高体系黏度,促进体系形成致密的炭层,提高体系的残炭量。研究还表明,在膨胀阻燃PP体系引入适量的氢氧化镧可在一定程度上提高体系的力学性能。
The effect of Ira （OH）3 on the flame retardancy and the mechanical properties of intumescent flame retardant-containing polypropylene composites was studied. The limiting oxygen index, UL-94 test, thermogravimetric analysis, scanning electron microscopy, tensile strength, elongation at break, and impact strength were employed to investigate the synergistic effects of La（OH）3. It showed that La（OH）3 could enhance the limiting oxygen index of the composites and made the retardaney reaching UL-94 V0. The limiting oxygen index of the composites with 0. 5 % La（OH）3 achieved 33. 0 %. And La（OH）3 contributed to the formation of a compact char layer on the surface of the composites and increased the amount of the char residue. It could be speculated that the La （OH）3 reacted with intumescent flame retardant and caused the crosslinking of the composites, which increased the viscosity and resulted in a more homogenous and compact structure of char. And a suitable amount of La（OH）3 could also benefit the mechanical properties of the composites.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第12期35-39,共5页
China Plastics
关键词
氢氧化镧
膨胀型阻燃剂
聚丙烯
阻燃性能
力学性能
lanthanum hydroxide
intumescent flame retardant
polypropylene
flame retardancy
mechanical property
