偶联剂对聚氯乙烯/粘土纳米复合材料结构与性能的影响

Effects of Coupling Agent on the Properties and Structures of Poly(Vinyl Chloride)/Clay Nano-Composites

采用固相法、用自制的插层剂和偶联剂对粘土进行有机化插层改性制备出有机粘土;然后采用熔融插层法制备了聚氯乙烯(PVC)/有机粘土纳米复合材料。研究表明,偶联剂KH-560处理的有机粘土与PVC形成插层型纳米复合材料,偶联剂KH-550处理的有机粘土与PVC形成的则是剥离型纳米复合材料。PVC/有机粘土的拉伸强度和冲击强度都有显著提高;KH550处理的有机粘土对PVC的改性效果明显优于KH560处理的有机粘土的改性效果。

The Org-clay was prepared by self-preparing intercalating agent and silane coupling agent treating Na-clay through solid state method and the polyvinyl chloride （PVC）/org-clay nanocomposites were prepared by melt intercalation. The PVC/org-550 nanocomposite, which was treated by silane coupling agent KH-550, possesses exfoliation structure and PVC/org-560 nanocomposite, which was treated by silane coupling agent KH-560, possesses intercalation structure. The mechanical properties of the nanocomposites were studied and the results indieat that the treatment of silane coupling agent on Org-Clay improves the tensile and impact strength of the nano-composite evidently. And the mechanical properties of the PVC/Org-550 nanocomposite are much better than PVC/Org-560 nanocomposite.