合成材料老化与应用2026，Vol.55Issue(4)：20-26,7.
氢氧化镁/含氟小分子液晶接枝线性低密度聚乙烯复合材料的制备及性能表征
Preparation and Performance Characterization of Magnesium Hydroxide/Fluorine-containing Small Molecule Liquid Crystal Grafted Linear Low-density Polyethylene Composites
摘要
Abstract
The fluorine-containing small molecule liquid crystal LC-F can significantly improve the processing fluidity and toughness of high-filled magnesium hydroxide/linear low-density polyethylene(MH/LLDPE)composites,but it simultaneously significantly reduces their mechanical strength and thermal stability.To address this issue,this study selected the MH/LLDPE/LC-F-3 system(with a 60％mass fraction of MH and a 3％mass fraction of LC-F),which has the best overall performance,as the basic research object.By introducing the initiator diisopropyl peroxide(BIBP),LC-F was covalently grafted onto the LLDPE backbone through melt blending to prepare MH/LLDPE-g-LC-F composites with high modulus,strength,and toughness.The effects of BIBP addition on the processing rheology,mechanical properties,thermal stability,and crystallization behavior of the composites were investigated.With the increase in BIBP dosage,in terms of mechanical properties,key mechanical indicators including tensile strength,elastic modulus and impact strength are significantly improved,while only the elongation at break decreases slightly;among these properties,the reinforcing effect on tensile strength is particularly prominent.Differential Scanning Calorimetry(DSC)results reveal that the crystallinity of the material decreases continuously with rising BIBP content.Thermogravimetric Analysis(TGA)verifies that the thermostability of graft-modified MH/LLDPE-g-LC-F composite is remarkably superior to that of the control group where LC-F is directly incorporated as a flow modifier.关键词
氢氧化镁/含氟小分子液晶/液晶性/线性低密度聚乙烯/复合材料Key words
magnesium hydroxide/fluorinated small-molecule liquid crystals/liquid crystallinity/linear low-density polyethylene/composites分类
化学化工引用本文复制引用
韦露,何奕汛,刘述梅,林绍泽,汤家俊,刘羽玲,刘显勇,王忠强,杨佳茜..氢氧化镁/含氟小分子液晶接枝线性低密度聚乙烯复合材料的制备及性能表征[J].合成材料老化与应用,2026,55(4):20-26,7.基金项目
东莞市重大科技项目库入库项目(项目编号:303163825026、401190606015). （项目编号:303163825026、401190606015）
