纳米氢氧化铝填充LDPE/EVA的力学和阻燃性能  

Mechanical properties and flame retardancy of CG-ATH/LDPE/EVA

作　　者：常志宏[1] 郭奋[1] 陈建峰[1] 王国全[1] 李振刚[1] 赵超凡[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术及应用科学教育部重点实验室,北京100029

出　　处：《化工学报》2005年第9期1771-1776,共6页CIESC Journal

基　　金：国家高技术研究发展计划项目(2002AA302605)~~

摘　　要：对纳米氢氧化铝(CGATH)在低密度聚乙烯/乙烯醋酸乙烯酯共聚物体系中(lowdensitypolyethylene/ethylenevinylacetatecopolymer,简称LDPE/EVA),填充量对力学性质和阻燃性质的影响进行了研究.通过力学性能测试和SEM分析表明,随着CGATH填充量的增加,树脂体系的断裂伸长率急剧下降,而其拉伸强度则呈先下降后上升的趋势,当CGATH的填充量为60%时,其拉伸强度达12.5MPa.通过燃烧性能测试、TG和DSC分析表明,CGATH的添加能够提高树脂体系的分解温度,增加结炭率,显著提高极限氧指数.通过综合分析,得到填充量为60%时,能够达到树脂体系力学性能与燃烧性能的最佳状态.The performances of LDPE/EVA （low density multiphase polymer blend filled with different amount polyethylene/ethylene vinyl acetate copolymer） of nano-aluminum trihydrate （CG-ATH） was investigated in this paper. The mass amount of CG-ATH filled into LDPE/EVA composites ranged from 10% to 70%. Tests results of mechanical properties showed that the elongation at break dropped sharply and the tensile strength dropped at first and went up later. The tensile strength of the composites of CG- ATH/LDPE/EVA reached 12.5 MPa when the amount of CG-ATH got to 60%. Through analysis of SEM photos, the consistent property between CG-ATH and LDPE/EVA multiphase polymer blend can be seen. Results also showed that although CG-ATH was not consistent to the blend, nanoparticles added could strengthen the blend. Tests of flame retardancy and analysis of TG and DSC showed that the addition of CG-ATH increased decomposition temperature of the composite, from 221.6 ℃ to 267.8℃. At the same time coking rate and limiting oxygen index （LOI） increased. Optimum mechanical properties and flame retardancy of the composites could be obtained at the CG-ATH＇s amount of 60%.

关 键 词：纳米氢氧化铝 阻燃 LDPE/EVA树脂体系 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]