时蛭石(VMT)有机改性后,以丙交酯为单体,在催化剂存在的条件下采用微波辅助原位聚合法制备聚乳酸/蛭石(PLA/VMT)纳米复合材料.利用广角X射线粉末衍射法(WAXD)、傅立叶红外光谱法(FT-IR)以及差示扫描量热法(DSC)对材料进行了表征.对蛭石的添加量对材料的插层效果以及材料性能的影响进行了讨论.结果表明,在反应时间很短的情况下,蛭石即可以纳米尺寸分布在PLA中.随蛭石含量的不同,分别得到了剥离型和插层性PLA/VMT纳米复合材料.
Polylactide acid (PLA)/vermiculite (VMT) nanocomposites was first prepared by in-situ polymerization of lactide with organically modified VMT (OVMT) under microwave assistance. The dispersion of VMT layers in the nanocomposites was investigated by wide angle X-ray diffraction (WAXD) and fourier infrared absorb spectrum (FT-IR). The results show that exfoliated PLA/VMT nanocomposites are obtained with VMT content less than 4%. The effect of the VMT content on the thermal behavior of the PLA VMT blends was also studied with differential scanning calorimetry (DSC). The thermal properties of PLA/VMT nanocomposite are found to greatly depend on the VMT content due to the strong interfacial bonding force involved.
参考文献
| [1] | Xu WB.;Liang GD.;Zhai HB.;Tang SP.;Hang GP.;Pan WP. .Preparation and crystallization behaviour of PP/PP-g-MAH/Org-MMT nanocomposite[J].European Polymer Journal,2003(7):1467-1474. |
| [2] | Xu J;Li RKY;Xu Y;Li L;Meng YZ .Preparation of poly(propylene carbonate)/organo-vermiculite nanocomposites via direct melt intercalation[J].European Polymer Journal,2005(4):881-888. |
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