Distortion of Chain Conformation and Reduced Entanglement in Polymer–Graphene Oxide Nanocomposites

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• 作者：M. P. Weir ; D. W. Johnson ; S. C. Boothroyd ; R. C. Savage ; R. L. Thompson ; S. M. King ; S. E. Rogers ; K. S. Coleman ; N. Clarke
• 刊名：ACS Macro Letters
• 出版年：2016
• 出版时间：April 19, 2016
• 年：2016
• 卷：5
• 期：4
• 页码：430-434
• 全文大小：381K
• 年卷期：0
• ISSN：2161-1653

文摘

We study the conformations of polymer chains in polymer–graphene oxide nanocomposites. We show that the chains have a reduced radius of gyration that is consistent with confinement at a solid interface in the melt, as is expected for well-dispersed, high aspect ratio nanoparticles that are much larger than the polymer coil size. We show that confinement of the polymer chains causes a corresponding reduction in interchain entanglements, and we calculate a contribution to the plateau modulus from the distorted polymer network via a simple scaling argument. Our results are a significant step forward in understanding how two-dimensional nanoparticles affect global material properties at low loadings.