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Fabrication of pre-exfoliated clay masterbatch via exfoliation-adsorption of polystyrene nanobeads

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Abstract

The approach studied in the present work produced an exfoliated state of clay layers via confinement of the charged nano-sized polystyrene (PS) beads within the gallery of swollen pristine clay. It was demonstrated that adsorption of the polymer nanobeads dramatically promotes expansion of the clay gallery. A comparative study of incorporation was conducted by employing organo-modified clay along with two different colloid polymer systems: electrostatically stabilized PS nanobeads and cationic monomer-grafted PS nanobeads. The mechanism of adsorption of the monomer-grafted polymer beads onto clay via cationic exchange between the alkyl ammonium group of the polymer nanobeads and the interlayer sodium cation of the layered silicate was verified by using several techniques. As distinct from the polymer nanobeads formed using conventional miniemulsion polymerization method, competitive adsorption of stabilizing surfactant molecules was be prevented by grafting the surface functional groups into the polymer chain, thereby supporting the observed effective adsorption of the polymer beads. The presence of surface functional groups that support the establishment of strong polymer-clay interactions was suggested to improve the compatibility of the clay with the polymer matrix and eventually play a crucial role in the performance of the final nanocomposites.

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Authors and Affiliations

  1. Polymer Hybrid Center, Korea Institute of Science and Technology, 136-791, Seoul, Korea

    Svetlana Khvan, Junkyung Kim & Sang-Soo Lee

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  1. Svetlana Khvan
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  2. Junkyung Kim
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  3. Sang-Soo Lee
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Correspondence to Sang-Soo Lee.

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Khvan, S., Kim, J. & Lee, SS. Fabrication of pre-exfoliated clay masterbatch via exfoliation-adsorption of polystyrene nanobeads. Macromol. Res. 15, 51–58 (2007). https://doi.org/10.1007/BF03218752

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  • DOI: https://doi.org/10.1007/BF03218752

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