摘要
研究了六硅酸镁对膨胀阻燃聚丙烯的协同效应。采用熔融共混法制备了一系列不同配比的六硅酸镁(MS3)/膨胀型阻燃剂(IFR)/聚丙烯(PP)复合材料;通过氧指数、锥形量热测试、热失重分析评价了复合材料的燃烧性能和热稳定性,采用扫描电子显微镜表征了残炭微观结构。发现添加1%的六硅酸镁,膨胀阻燃体系的氧指数由38.1提高至42.0,增加了10.2%,热释放速率峰值和总释热量分别降低了72kW/m2和11 MJ/m2,700℃炭层残留量由6.3%提高至12.5%,膨胀炭层的致密性和完整性显著提高,残炭量显著增加,阻燃和热稳定性显著增强。
The synergistic effect of magnesium silicate on intumescent flame retardant polypropylene was researched. Polypropylene/intumescent flame retardant/magnesium silicate composites （PP/IFR/MS3） were prepared by a method of melt blending using magnesium silicate as synergistic agent. The thermal stabilization and flame properties of intumescent flame retardant polypropylene composites were evaluated by thermogravimetric analysis （TGA）, limiting oxygen index （LOI） and cone calorimeter test （CCT）, and the char microstructure was characterized by scanning electron microscopy （SEM）. With the addition of 1% magnesium silicate, the LO1 is increased by 10.2% （from 38.1 to 42）. The peak heat release rate （PHRR） and the total heat release （THR） are reduced by 72 kW/m2 and 11 MJ/m2, respectively. The amount of char residue is increased from 6.3 % to 12.5 %. The thermal stabilization and flame retarding of the composite are significantly enhanced due to the tight and complete char layer obtained from intumescent flame retardant polypropylene system contained magnesium silicate.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第11期186-190,共5页
Polymer Materials Science & Engineering
基金
教育部博士点专项基金(20090132110009)
关键词
六硅酸镁
膨胀型阻燃剂
聚丙烯
协同效应
magnesium silicate
intumescent flame retardant
polypropylene
synergistic effect
