PP/OMMT纳米复合材料制备技术研究

Study on Preparation Technology of PP/OMMT Nanocomposites

对潍坊某地的膨润土(MMT)原料进行提纯、用碳酸钠作为钠化剂进行钠化改型及有机改性,制备出与聚合物相容性较好的有机膨润土(OMMT),将之与聚丙烯(PP)复合制备出PP/OMMT纳米复合材料。重点研究了不同改性剂对MMT层间距的影响以及OMMT用量对复合材料力学性能的影响。结果表明:在十八烷基苄基二甲基溴化铵(1827)和己内酰胺复合改性剂的作用下,MMT的层间距扩大到2.44 nm;在一定范围内,随着OMMT用量的增加,PP/OMMT纳米复合材料的冲击强度和拉伸强度呈现先提高再降低的趋势,OMMT用量为2%时,复合材料的缺口冲击强度达到6.65 kJ/m2,拉伸强度达到24.53 MPa。

The organic MMT （OMMT） was prepared with purified MMT and sodium carbonate as sodium agent of sodium modification and organic modification, and then the PP/OMMT nanocomposites were prepared. The effects of modifiers on layer spacing of MMT and OMMT, content on mechanical properties of PP/OMMT nanocomposites were researched. The results show that： the layer spacing of MMT expands to 2.44 nm by adding composite modifier of octadecyl benzyl bromide （1827） and caprolactam; between a certain range content of OMMT, the notched impact strength and tensile strength of PP/OMMT nanocomposites increase firstly and then reduce with the increasing of OMMT content. When the OMMT content is 2%, the notched impact strength of the material reaches to 6.65 kJ/m2, and tensile strength reaches to 24.53 MPa.