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Structure and Dynamics of Polymer Nanocomposites Involving Chain-Grafted Spherical Nanoparticles

  • Peter F. GreenEmail author
  • Hyunjoon Oh
  • Pinar Akcora
  • Sanat K. Kumar
Chapter
Part of the Neutron Scattering Applications and Techniques book series (NEUSCATT)

Abstract

Polymer nanocomposites (PNCs), created through the incorporation of nanoparticles into polymer hosts, exhibit a diverse range of properties that are often significantly different from the polymer host. The properties, generally emergent, are derived from complex cooperative entropic and enthalpic interactions between the chains and the nanoparticles and are strongly dependent on microstructural features. A primary challenge is controlling the microstructure; one effective strategy is through grafting chains of varying grafting densities, onto the nanoparticles. This chapter discusses the morphological structure, glass transition, and the short- and long-range dynamics of mixtures of homopolymers with grafted nanoparticles. It is shown how the grafting density, particle radius, and degree of polymerization of both the grafted chains and the host profoundly influence the microstructural features of the PNC. Two fundamentally different types of morphologies are encountered in the limits of low and high grafting densities. The role of neutron scattering techniques, in combination with other characterization techniques, is shown to play an important role toward understanding the molecular mechanisms that control the structure, dynamics, and glass transition of these confined systems.

Keywords

Small Angle Neutron Scattering Chain Dynamic Longe Relaxation Time Enthalpic Interaction Homopolymer Chain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Peter F. Green
    • 1
    Email author
  • Hyunjoon Oh
    • 1
  • Pinar Akcora
    • 2
  • Sanat K. Kumar
    • 2
  1. 1.Department of Materials Science and EngineeringUniversity of MichiganAnn ArborUSA
  2. 2.Department of Chemical EngineeringColumbia UniversityNew YorkUSA

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