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首页> 外文期刊>Polymer Composites >Use of Supercritical CO2 as a Dispersing Agent in the Preparation of a Polymer-Layered Silicate Nanocomposite
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Use of Supercritical CO2 as a Dispersing Agent in the Preparation of a Polymer-Layered Silicate Nanocomposite

机译：在制备聚合物层状硅酸盐纳米复合材料中使用超临界CO2作为分散剂

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摘要

The usefulness of supercritical CO2 (scCO(2)) in the processing of thermoplastic olefin (TPO) nanocomposites was investigated using a simple extensional flow mixing device. An organoclay (Cloisite (R) 20A), a maleated polypropylene (Polybond (R) 3200), and a TPO polymer were selected for this study. The three components were combined in different manners to evaluate how scCO(2) influenced the microstructure of a final nanocomposite prepared by different mixing orders of the formulation components. The organoclay was examined in its as-supplied state as well as after being conditioned under scCO(2). Analyses of the nanocomposites by X-ray diffraction, transmission electron microscopy, and parallel plate rheology techniques showed that inclusion of scCO(2) during melt compounding significantly contributed to disrupting the crystalline order in the structure of the original organoclay. However, the order by which the formulation components are combined under scCO(2) was important to clay dispersion. It was shown that making use of the proper combination order led to an improvement in the modulus of the resulting nanocomposites as measured by rheology. (C) 2015 Society of Plastics Engineers
机译：使用简单的延伸流动混合装置研究了超临界CO2（SCCO（2））在热塑性烯烃（TPO）纳米复合材料中的有用性。选择有机粘土（Cloisite20A），为本研究选择了原料聚丙烯（聚丙二（R）3200）和TPO聚合物。三种组分以不同的方式组合以评估SCCO（2）如何影响通过配制成分的不同混合序列制备的最终纳米复合材料的微观结构。在其供应状态下检查有机粘土，以及在SCCO（2）下调节后。通过X射线衍射，透射电子显微镜和平行板流变技术分析纳米复合材料，表明，在熔融配合期间包含SCCO（2）显着促使原始有机粘土结构中的结晶顺序。然而，在SCCO（2）下配方组分组合的顺序对于粘土分散体是重要的。结果表明，使用适当的组合顺序导致通过流变学测量的所得纳米复合材料的模量的改善。 （c）2015年塑料工程师协会

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