原位聚合制备不饱和聚酯树脂/高岭土纳米复合材料及性能表征

利用超声法制备了高岭土-DMSO插层复合物前驱体,采取二步取代,原位聚合制备了不饱和聚酯树脂/高岭土纳米复合材料,并用XRD、FT-IR等手段对材料结构进行了表征,研究了纳米复合材料的阻燃性能。结果表明:当DMSO分子插入到高岭土层间时,d(001)值由0.717 nm增大到1.12 nm,插层率为91%,而不饱和聚酯树脂取代DMSO进入高岭土层间后,表征层状结构的d(001)特征衍射峰完全消失,高岭土内表面羟基吸收特征峰(3651 cm-1)和DMSO两个甲基的对称和反对称伸缩振动的吸收特征峰消失。燃烧实验表明这种材料相比纯树脂具有更好的阻燃性能。

Preparation and Characterization of Unsaturated Polyester Resin/Kaolinite Intercalation Nanocomposites by in Situ Polymerization

Unsaturated polyester resin(UP) /kaolinite intercalation nanocomposites were prepared by in situ polymerization through UP replacing DMSO in kaolinite/ DMSO intercalation usher,which was prepared by sonochemistry technique.The structure of the nanocomposites was characterized by using XRD and FT-IR,and the flame retardant properties were studied.The results show that the value of d(001) of kaolinite is increased from 0.717 nm to 1.12 nm and the intercalation radio is 91% when the DMSO molecular has intercalated in kaolinite crystallites.The typical diffraction peak representing the layer structure(d(001)) and absorption peaks at 3651 cm-1,3017 cm-1 and 2930 cm-1 representing the inner surface hydroxyl and-CH3 in DMSO molecular respectively disappeared nearly in UP/kaolinite nanocomposites,which indicates that the UP chains have replaced DMSO completely in kaolinite crystallites,and the exfoliated nanocomposites are prepared.The combustion tests show that the flame retardant properties of nanocomposites have improved remarkably compared with pure resin.