不同有机化蒙脱土对聚丙烯/蒙脱土纳米复合材料结构和性能的影响

采用不同的有机改性剂制备了三种含羟基极性基团、环氧基和不含极性基团的有机化蒙脱土, 并与混有少量马来酸酐接枝聚丙烯的聚丙烯基体进行复合, 制备了聚丙烯粘土纳米复合材料. 采用X射线衍射仪、透射电子显微镜、热分析仪、示差扫描热分析仪和力学测试仪对样品进行结构表征和力学性能测试. 探讨和比较了不同有机化蒙脱土对聚丙烯/蒙脱土纳米复合材料结构和性能的影响. 结果表明, 携带极性基团的有机改性剂和马来酸酐接枝聚丙烯的强烈相互作用有利于有机化蒙脱土在复合材料中的插层、剥离和稳定性, 由此形成的聚丙烯粘土纳米复合材料具有更高的结晶度, 其力学性能的提高也更为显著.

Effect of Different Organo-montmorillonites on Structure and Properties of PP/Montmorillonite Nanocomposite Materials

Organo-montomorillonites with hydroxyl, epoxy and no polar groups were prepared. They were used to prepare PP/clay nanocomposite materials with maleic anhydride-PP as a compatilizer. The structure and the mechanical properties were measured via XRD, TEM, DSC and TGA. The effect of organo-montmorillonite on the structure and properties of PP/clay nanocomposites were studied. The results show that organo-montmorillonite with polar group has a strong affinity to maleic anhydride-PP, it benefits the intercalation and exfoliation of clay and also the increase of degree of crystallization and the mechanical properties.