聚合物包覆型纳米片层粒子对氢化丁腈橡胶复合材料性能的影响

制备了一系列不同量的剥离型有机蒙脱土(OMMT)与氢化丁腈橡胶(HNBR)复合的纳米材料,探究了OMMT的含量对HNBR复合材料力学、热力学性能的影响。采用广角X射线衍射(XRD)、差示扫描量热分析(DSC)、热重分析、傅里叶变换红外光谱、透射电镜对OMMT的结构与性能进行了表征。并对HNBR/OMMT复合材料的结构与性能进行了分析。XRD结果表明OMMT是完全剥离且由聚氨酯大分子链包覆的纳米片层粒子;DSC结果证明OMMT中的活性双键能发生反应。加入单片层OMMT后,HNBR纳米复合材料的力学性能、热力学性能以及动态性能都有所提高。且3phr的OMMT能使复合材料的耐磨性提高了24.7%,硬度、拉伸强度、撕裂强度等达到最大值。

Influence of Polymer Coated Montmorillonite Single Layers on the Properties of HNBR Composites

A series of hydrogenated butadiene-acrylonitr.ile rubber (HNBR)/exfoliated organic montmorillonite (OMMT) nanocomposites were prepared.The effect of OMMT content on mechanical and thermodynamics properties of HNBR was studied.FT-IR,XRD,TGA,DSC and TEM were used to characterize the structure and performance of OMMT.The properties and structure of HNBR/OMMT nanocomposites were characterized by strain-stress machine,Akron abrasion machine,TGA,DSC and so on.XRD results show that the OMMT coated with polyurethane macromolecular chain is completely exfoliated.The results of DSC show that the active double bond of OMMT would react.After single layer OMMT is added,the mechanical properties and thermodynamic performance of HNBR nanocomposites are improved highly.And when the OMMT content is 3 phr,the wear resistance of composites is increased by 24.7 ％,and the hardness,tensile strength,tear strength reach the maximum value.