混合条件对环氧有机土纳米复合材料插层剥离行为及性能的影响

采用X 射线衍射仪、透射电镜 (TEM )研究了混合条件 ,即混合温度和时间 ,对环氧 /16 烷基胺有机蒙脱土体系在固化前的混合物以及加入固化剂、促进剂固化后有机土的插层与剥离行为的影响 .同时采用拉伸试验机、冲击试验机和热机械分析仪测定了插层与剥离型纳米复合材料的物理力学性能 .从X 射线衍射看出 ,有机土很容易在混合过程被环氧所插层 .混合物经固化后可以形成插层型或剥离型纳米复合材料 .存在一个混合温度 时间 插层剥离转变的 3 T图 .只有在一定的混合条件的区域内才能形成剥离型纳米复合材料 .剥离型比插层型纳米复合材料具有较高的力学性能

THE EFFECT OF MIXING CONDITIONS ON INTERCALATION,EXFOLIATION BEHAVIOURS AND PROPERTIES OF EPOXY/ORGANOCLAY NANOCOMPOSITES

The effects of mixing conditions including mixing temperatures and mixing time on the intercalation and exfoliation behaviors of epoxy/ n \|hexadecyllammonium\|montmorillonite clay mixtures and their nanocomposites after curing with curing agent (MeTHPA) and catalyst (DMBA) have been investigated by XRD and TEM.The physical\|mechanical properties of the nanocomposites have been measured by tensile testing machine,charpy impact test and heat distortion test instruments.The X\|ray diffraction patterns revealed that organoclay was easily intercalated by the epoxy resin during mixing process.Either an intercalation or an exfoliation nanocomposite might be obtained after the mixtures were cured by the curing agent system.There is a mixing temperature\|time\|intercalation exfoliation transition diagram (3 T diagram).Only under certain mixing conditions,the exfoliation nanocomposite materials could be formed.The mechanical properties of exfoliation nanocomposite materials were better than those of the intercalation ones.