Order–Disorder Transition of Nanocomposites: Polystyrene-<i>block</i>-Poly(methyl methacrylate) with Palladium Nanoparticles

DOI Web Site 被引用文献1件
  • Takeji Hashimoto
    Quantum Beam Science Directorate (QuBS), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
  • Kenji Saijo
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
  • Yue Zhao
    Quantum Beam Science Directorate (QuBS), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan

書誌事項

公開日
2013-01-31
DOI
  • 10.1021/ma302070r
公開者
American Chemical Society (ACS)

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説明

We studied how the palladium nanoparticles, (Pd)ns, incorporated into poly(styrene)-block-poly(methyl methacylate) (PS-b-PMMA) block copolymer (bcp), alter its order–disorder transition (ODT). The (Pd)ns were incorporated into the lamellar template of PS-b-PMMA by the thermal reduction of Pd(acac)2, dissolved uniformly in the bcp before the reduction, at 230 °C where both the neat PS-b-PMMA and the PS-b-PMMA incorporated with (Pd)ns (nanocomposite) are in the disordered state. The ODT behavior of the neat bcp and the nanocomposites are investigated by small-angle X-ray scattering as a function of temperature. We found that: (i) the average size and size distribution of (Pd)ns did not change at all during the heating and cooling processes across the ODT; (ii) the incorporation of a very small amount (1 wt %) of (Pd)ns significantly increased the ODT temperature (TODT) by ∼8 °C and the lamellar spacing D by ∼1%. These trends were found to be completely opposite to those previously reported on the (Pd)ns inc...

収録刊行物

  • Macromolecules

    Macromolecules 46 (3), 957-970, 2013-01-31

    American Chemical Society (ACS)

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