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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and properties of polyethylene/montmorillonite nanocomposites by in situ polymerization
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Preparation and properties of polyethylene/montmorillonite nanocomposites by in situ polymerization

机译：原位聚合制备聚乙烯/蒙脱土纳米复合材料及其性能

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Polyethylene (PE)/montmorillonite (MMT) nanocomposites were prepared by in situ coordination polymerization using a MMT/MgCl2/TiCl4 catalyst activated by AI(Et),. The catalyst was prepared by first diffusing MgCl2 into the swollen MMT layers, followed by loading TiCl4 on the inner/outer layer surfaces of MMT where MgCl2 was already deposited. The intercalation of MMT layers by MgCl2 and TiCl, was demonstrated by the enlarged interlayer spacing determined by WAXD. The nanoscale dispersion of MMT layers in the polyethylene matrix was characterized by WAXD and TEM. As a consequence, the crystallinity of the nanocomposite decreased sharply, whereas the tensile strength was significantly improved compared to that of virgin polyethylene of comparable molecular weight. The confinement of the nanodispersed MMT layers to molecular chain and the strong interaction between the nanoscale MMT layers and the resin matrix were thought to account for the decrease of crystallinity and the remarkable enhancement of strength. (C) 2003 Wiley Periodicals, Inc. [References: 11]
机译：使用AI（Et）活化的MMT / MgCl2 / TiCl4催化剂通过原位配位聚合制备聚乙烯（PE）/蒙脱土（MMT）纳米复合材料。通过首先将MgCl2扩散到溶胀的MMT层中，然后将TiCl4加载到已经沉积MgCl2的MMT的内/外表面上来制备催化剂。通过WAXD确定的增大的层间距来证明MgCl2和TiCl插入MMT层。 MMT层在聚乙烯基体中的纳米级分散体通过WAXD和TEM表征。结果，与相当分子量的原始聚乙烯相比，纳米复合材料的结晶度急剧下降，而抗张强度显着提高。认为纳米分散的MMT层局限于分子链以及纳米级MMT层与树脂基体之间的强相互作用是造成结晶度降低和强度显着提高的原因。 （C）2003 Wiley Periodicals，Inc. [参考：11]

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