两类无卤阻燃体系对mPE树脂基体阻燃和力学性能的影响
Effect of Two Halogen-Free Flame Retardant System on the Flame Retardant and Mechanical Properties of mPE Resin Matrix
胡明浩 1周松 1王涛 1杨青林 1李璨然1
作者信息
- 1. 西南石油大学,新能源与材料学院,四川,成都 610500
- 折叠
摘要
以乙烯-辛烯共聚物(POE)及乙烯-醋酸乙烯酯共聚物(EVA)为增韧剂、马来酸酐接枝线型低密度聚乙烯(LLDPE-g-MAH)为增容剂,分别采用磷氮阻燃剂(PN)和纳米蒙脱土(nano-OMMT)、氢氧化铝(ATH)和氢氧化镁(MH)阻燃体系,利用双螺杆挤出和注射成型制备无卤阻燃茂金属聚乙烯(mPE)复合材料.测试并分析了PN/nano-OMMT/mPE、ATH/MH/mPE和PN/ATH/MH/mPE复合材料的热稳定性、阻燃和力学性能.结果表明,与mPE树脂基体相比,ATH/MH的热分解温度范围较大.PN/nano-OMMT的阻燃效率高于ATH/MH.当PN/nano-OMMT含量为50％时,PN/nano-OMMT/mPE的LOI为30.8％,垂直燃烧等级达到UL 94 V-0级;当ATH/MH含量由40％增大至70％时,mPE复合材料拉伸强度从10.86 MPa增大至12.48 MPa,断裂伸长率从539％下降至109％.在满足阻燃性能相同的条件下,PN/nano-OMMT/mPE的断裂伸长率高于ATH/MH/mPE,但拉伸强度较低.10％PN部分替代ATH/MH后,60％PN/ATH/MH/mPE的断裂伸 长率和LOI均提高.
Abstract
Halogen-free flame retardant metallocene polyethylene(mPE)composite were prepared by twin-screw extruder and injection molding using ethylene-octene copolymer(POE)and ethylene-vinyl acetate copolymer(EVA)as tougheners,maleic anhydride grafted linear low density polyethylene(LLDPE-g-MAH)as compatibilizer,phosphorus nitrogen(PN)and nano-montmorillonite(nano-OMMT),or aluminum hydroxide(ATH)and magnesium hydroxide(MH)as compound flame retardant system,respectively.Tested and analyzed the thermal stability,flame retardant and mechanical properties of the PN/nano-OMMT/mPE、ATH/MH/mPE and PN/ATH/MH/mPE composite.The results indicated that the thermal decomposition temperature range of flame retardant(ATH/MH)(260～512 ℃)completely covered the thermal degradation range of mPE resin matrix(430～500 ℃).PN/nano-OMMT had higher flame retardant efficiency compared with ATH/MH.When the content of PN/OMMT was 50％,the LOI of PN/nano-OMMT/mPE reached 30.8％,and the combustion grade was UL 94 V-0.The tensile strength of mPE composite increased from 10.86 MPa to 12.48 MPa,and the elongation at break decreased from 539％ to 109％ with increasing the ATH/MH content from 40％ to 70％.Under the condition of satisfying the same flame retardancy,PN/nano-OMMT/mPE had higher elongation at break and lower tensile strength compared with ATH/MH/mPE.When 10％PN partially replaced ATH/MH,the elongation at break and LOI of 60％PN/ATH/MH/mPE were improved simultaneously.
关键词
氢氧化铝/氢氧化镁/磷氮无卤阻燃剂/纳米蒙脱土/茂金属聚乙烯/阻燃/力学性能Key words
aluminum hydroxide/magnesium hydroxide/phosphorus nitrogen halogen-free flame retardant/nano-montmorillonite/metallocene polyethylene/flame retardant/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据