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首页> 外文期刊>ACS Macro Letters >Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films
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Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

机译：通过平行不混溶的聚合物薄膜缠结聚合物的位置依赖性扩散动力学纳米胺熔融

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摘要

The morphological structure and dynamics of confined polymers adjacent to the polymer–polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (d PMMA) allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS–PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer–polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS–PMMA interface.
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  • 来源
    《ACS Macro Letters》 |2020年第10期|共6页
  • 作者

    Kyoung-Il Jo; Younghoon Oh; Tae-Ho Kim; Joona Bang; Guangcui Yuan; Sushil K. Satija; Bong June Sung; Jaseung Koo;

  • 作者单位

    Neutron Science Center Korea Atomic Energy Research Institute (KAERI);

    Department of Chemistry and Research Institute for Basic Science Sogang University;

    Department of Organic Materials Engineering Chungnam National University;

    Department of Chemical and Biological Engineering Korea University;

    NIST Center for Neutron Research National Institute of Standards and Technology;

    NIST Center for Neutron Research National Institute of Standards and Technology;

    Department of Chemistry and Research Institute for Basic Science Sogang University;

    Department of Organic Materials Engineering Chungnam National University;

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  • 正文语种 eng
  • 中图分类 有机化学;
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