摘要
为提高茂金属线型低密度聚乙烯(mPE-LLD)的阻燃和综合力学性能,以乙烯-辛烯共聚物(POE)和乙烯-乙酸乙烯酯共聚物(EVAC)为增韧剂,马来酸酐接枝线型低密度聚乙烯(PE-LLD-g-MAH)为增容剂,氢氧化铝/氢氧化镁(ATH/MH)为主阻燃剂,滑石粉(Talc)和硼酸锌(ZB)为协效阻燃剂,通过熔融共混制备mPE-LLD阻燃复合材料。采用极限氧指数(LOI)、垂直燃烧试验、热重和拉伸试验,研究了mPE-LLD/ATH/MH和mPE-LLD/Talc/ZB/ATH/MH复合材料的热稳定性、阻燃和力学性能,并与mPE-LLD/磷氮阻燃剂(PN)/纳米蒙脱土(nano-OMMT)复合材料的性能进行了比较。研究表明:固定阻燃剂(ATH,MH,ZB,Talc)总质量分数为60%,用质量分数为12%的Talc/ZB替代ATH/MH,使复合材料的拉伸强度略有下降,断裂伸长率提高;Talc/ZB质量比为1∶1,复合材料的断裂伸长率提高了50.2%,复合材料的拉伸强度(9.7 MPa)和断裂伸长率(294.0%)高于mPE-LLD/60%(PN/nano-OMMT);Talc/ZB质量比由5∶1降至1∶5,复合材料的600℃质量保持率和热稳定性提高,高于mPE-LLD/60%(ATH/MH)。Talc/ZB质量比为5∶1时,mPE-LLD/60%(Talc/ZB/ATH/MH)的LOI值(31.6%)高于mPE-LLD/60%(PN/nano-OMMT)的LOI值(30.8%)和mPE-LLD/70%(ATH/MH)的LOI值(30.7%),Talc/ZB和ATH/MH具有协同阻燃性。
In order to improve the flame retardant and comprehensive mechanical properties of metallocene linear low density polyethylene(mPE-LLD),ethylene-octene copolymer(POE)and ethylene-vinyl acetate copolymer(EVAC)were used as tougheners,and maleic anhydride grafted linear low density polyethylene(PE-LLD-g-MAH)was used as compatibilizer.The mPE-LLD flame retardant composite was prepared by melt blending of aluminum hydroxide and magnesium hydroxide(ATH/MH)as main flame retardants,talc and zinc borate(ZB)as synergistic flame retardants.Ultimate oxygen index(LOI),vertical combustion test,thermogravimetric analysis and tensile tests were used to study the thermal stability,flame retardant and mechanical properties of the m-PE-LLD/ATH/MH and mPE-LLD/Talc/ZB/ATH/MH composites,and compared with the properties of mPE-LLD/phosphorusnitrogen flame retardant(PN)/nano-montmorillonite(nano-OMMT)composites.The results indicate that when the total mass fraction of fixed flame retardants(ATH,MH,ZB,Talc)is 60%,adding 12%of Talc/ZB mass fraction to replace ATH/MH,the tensile strength of the composites decrease slightly and the elongation at break increase.When the mass ratio of Talc/ZB is 1∶1,the elongation at break of the composites is increased by 50.2%,and the tensile strength(9.7 MPa)and elongation at break(294.0%)of the composites are higher than those of mPE-LLD/60%(PN/nano-OMMT).When the mass ratio of Talc/ZB decrease from 5∶1 to 1∶5,the mass retention rate at 600℃and thermal stability of the composites increase,which is higher than those of mPE-LLD/60%(ATH/MH)composites.When the mass ratio of Talc/ZB is 5∶1,the LOI(31.6%)of mPE-LLD/60%(Talc/ZB/ATH/MH)is higher than LOI(30.8%)of mPE-LLD/60%(PN/nano-OMMT)and LOI(30.7%)of mPE-LLD/70%(ATH/MH),due to the synergistic flame retardant effect of Talc/ZB and ATH/MH.
作者
王涛
周松
胡明浩
杨青林
李璨然
Wang Tao;Zhou Song;Hu Minghao;Yang Qinlin;Li Canran(College of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;Gold Cup Electric Chengdu Co.,Ltd,Chengdu 610500,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2023年第5期135-140,164,共7页
Engineering Plastics Application
关键词
茂金属聚乙烯
氢氧化铝
氢氧化镁
滑石粉
硼酸锌
协同效应
力学性能
metallocene polyethylene
aluminum hydroxide
magnesium hydroxide
talc powder
zinc borate
synergistic effect
mechanical property
