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Shear-induced ordered structure in polystyrene/clay nanocomposite

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Abstract

A shear-induced ordered structure in an exfoliated polystyrene (PS)/clay nanocomposite is reported. X-ray diffraction (XRD), transmission electron microscopy (TEM), and infrared dichroism techniques have been employed to investigate the shear-induced ordered structure in the exfoliated PS/clay nanocomposite. Compared with the broad amorphous peaks before extrusion, a series of sharp diffraction peaks were observed in XRD pattern for the extruded PS/clay nanocomposite pellet sample, showing that an ordered structure occurred under shear flow. TEM images confirmed directly that the origin of the ordered structure was mainly due to the planar orientation of the primary particles of silicate layers as well as local ordered microstructure of the primary particles, induced by shear flow. The infrared dichroism study indicated that the phenyl group of PS apparently oriented parallel to the film surface, whereas no obvious orientation of the aliphatic chain could be observed. Based on these investigations, a possible mechanism was deduced for the formation of the ordered structure induced by shear flow in the exfoliated PS/clay nanocomposite.

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Authors and Affiliations

  1. State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, People’s Republic of China

    Guangming Chen & Zongneng Qi

  2. Polymer Physics Laboratory, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, People’s Republic of China

    Deyan Shen

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  1. Guangming Chen
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  2. Zongneng Qi
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  3. Deyan Shen
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Chen, G., Qi, Z. & Shen, D. Shear-induced ordered structure in polystyrene/clay nanocomposite. Journal of Materials Research 15, 351–356 (2000). https://doi.org/10.1557/JMR.2000.0055

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  • DOI: https://doi.org/10.1557/JMR.2000.0055

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