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首页> 外文期刊>Journal of Applied Polymer Science >Morphological evaluation and phase behavior of PVDF/PEO blends in the presence of graphene nanoplatelets through rheological measurements
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Morphological evaluation and phase behavior of PVDF/PEO blends in the presence of graphene nanoplatelets through rheological measurements

机译：通过流变测量在石墨烯纳米克罗特族存在下PVDF / PEO混合物的形态学评价和相行为

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In this study, graphene nanoplatelets (GNPs) were incorporated into poly(vinylidene fluoride) (PVDF), poly(ethylene oxide) (PEO), and PVDF/PEO blends using solution casting method in order to achieve binary and ternary polymer nanocomposites. The focus of the work is on the compatibilizing effects of the GNPs on partially miscible PVDF/PEO blends. X-ray diffraction method, rheological measurements, scanning electron microscopy (SEM), and atomic force microscopy observations enabled us to track the dispersion state and localization of the graphene nanosheets in the nanocomposites. The results exhibited that the nanoplatelets were preferentially distributed through the PVDF phase and/or at the interface of the PVDF/PEO phases. Evaluation of the wetting parameter for the PVDF/PEO/GNPs nanocomposite also verified better affinity of the selected nanofiller with the PVDF component. Extend of the miscibility in the nanocomposites was studied by a well-known rheological method. A tangible increment in binodal (T-b) and spinodal (T-s) decomposition temperatures by addition of a very low content of the GNPs (0.5 wt %) revealed well-defined compatibilization effects of the graphene on this binary polymer blend. SEM images at different temperatures confirmed the rheologically determined liquid-liquid phase diagram. (c) 2019 Wiley Periodicals, Inc.
机译：在该研究中，使用溶液浇铸方法将石墨烯纳米片（GNP）掺入聚（偏二氟乙烯）（PVDF），聚（环氧乙烯）（PEO），PVDF / PEO混合物中，以实现二元和三元聚合物纳米复合材料。作品的重点是在部分混溶的PVDF / PEO混合物上的GNP的相容效应。 X射线衍射方法，流变测量，扫描电子显微镜（SEM）和原子力显微镜观察使我们能够跟踪纳米复合材料中石墨烯纳米片的分散状态和定位。结果表明，纳米泊素优先通过PVDF相和/或PVDF / PEO相的界面分布。对PVDF / PEO / GNPS纳米复合材料的润湿参数的评价还验证了所选纳米填料与PVDF组分的更好的亲和力。通过众所周知的流变方法研究纳米复合材料中的混溶性延伸。通过添加非常低的GNPS（0.5wt％）的二进石（T-B）和旋趾（T-S）分解温度的有形增量（0.5wt％）揭示了石墨烯对该二元聚合物共混物的良好定义的相容作用。不同温度的SEM图像证实了流变确定的液体相相图。 （c）2019 Wiley期刊，Inc。

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