摘要
针对高密度聚乙烯(HDPE)的易燃性,以高密度聚乙烯与有机蒙脱土(OMMT)、卤锑阻燃剂(DBDPE/Sb2O3)熔融共混制成HDPE/有机蒙脱土阻燃复合材料,研究了有机蒙脱土(OMMT)与卤锑阻燃剂在复合材料中的阻燃协效性,并对复合材料进行了极限氧指数(LOI)、垂直燃烧等级(UL-94)、力学性能和热稳定性测试。结果表明:有机蒙脱土与卤锑阻燃剂对HDPE具有良好的阻燃协效作用。HDPE/OMMT阻燃复合材料的LOI由纯HDPE的19.6%提高至27.8%,垂直燃烧等级则由"完全燃烧"逐渐提高至V-0级,且燃烧时不产生熔滴,具有良好的成炭效应;其拉伸强度由13.24MPa提高至24.53MPa,力学性能表现良好;其失重率由纯HDPE的96.17%降至90.37%,热稳定性得到提高。HDPE/OMM4阻燃复合材料也有类似情况,且其各项性能指标表现更好。
Seeing th ites of high density means of direct me at the high density polyethylene （HDPE） is inflammable, flame retardant com polyethylene and organically modified montmorillonite （OMMT） were prepare It-blending technique for HDPE, OMMT and halogen-antimony flame retar OS- by ant （HAFR）-DBDPE/Sb2O3. The flame--retardant synergism of OMMT with HAFR in HDPE/OMMT composites was studied by means of limiting oxygen index （LOI）, vertical burning grade （UL 94）, the mechanical property and the thermal stability tests. The results showed that the synergistic flame retardant effect of OMMT and HAFR was satisfactory. The LOI of flame-retardant HDPE/OMM1 composite material increased from 19. 6% of pure HDPE to 27.8%, the vertical flammability level gradually raised from ＂complete combustion＂ to level V-0, and combustion droplet was not produced with a good char formation effect. Tensile strength increased from 13.24 MPa to 24.53 MPa, which testified that the material had good mechanical properties. Weight loss rate decreased from 96.17 % of pure HDPE to 90.37%, which indicated that the thermal stability was improved compared with pureHDPE. Flame-retardant HDPE/OMM4 composite materials also have a similar situation, and its per- formances are better.
出处
《精细石油化工》
CAS
CSCD
北大核心
2013年第1期51-55,共5页
Speciality Petrochemicals
基金
广西理工科学实验中心重点项目(lgzx201108)
关键词
有机蒙脱土
卤锑阻燃剂
高密度聚乙烯
阻燃协效
organically modified montmorillonite
halogen-antimony flame retardant
high density polyethylene
synergistic flame retardant effect
