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首页> 外文会议>NMR spectroscopy of polymers: Innovative strategies for complex macromolecules >Investigation of Filler-Matrix Interactions and Confinement Effect in Polymer Nanocomposites
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Investigation of Filler-Matrix Interactions and Confinement Effect in Polymer Nanocomposites

机译：聚合物纳米复合材料中填料-基体相互作用和约束作用的研究

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摘要

Although nanocomposites are known for decades, the molecular interactions under the confined environments of such composites are not well understood. In this article we report the influence of two types of fillers, viz., graphite (G) and graphene oxide (GO) nanosheets, on polyimide (PI) matrix with varying filler content. Solid state NMR and thermo-mechanical analysis were deployed to characterize the morphology of hybrid materials and the interactions between the polymer and the filler. CP-MAS and relaxation experiments were performed to probe the interaction between inorganic and organic phases on a molecular level and to elucidate polymer dynamics. NMR relaxation measurements further helped in elucidating the polymer dynamics and were supplemented by thermo-mechanical relaxation. From the relaxation data it is clear that GO interacts better than G with the polyimide matrix. This is further confirmed by the higher modulus observed for PI-GO nanocomposites than for PI-G.
机译：尽管纳米复合材料已经有数十年的历史了，但是在这种复合材料的密闭环境下的分子相互作用还不是很清楚。在本文中，我们报告了两种类型的填料，即石墨（G）和氧化石墨烯（GO）纳米片，对具有不同填料含量的聚酰亚胺（PI）基质的影响。固态NMR和热机械分析被用来表征杂化材料的形态以及聚合物和填料之间的相互作用。进行了CP-MAS和弛豫实验，以在分子水平上探查无机相和有机相之间的相互作用，并阐明了聚合物动力学。 NMR弛豫测量进一步有助于阐明聚合物动力学，并辅以热机械弛豫。从弛豫数据可以清楚地看出，GO与G在聚酰亚胺基体上的相互作用更好。 PI-GO纳米复合材料的模量高于PI-G，这进一步证实了这一点。

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  • 来源
  • 会议地点 Honolulu HI(US);Honolulu HI(US)
  • 作者

    K. P. Pramoda; K. Y. Mya; T. T. Lin; J. Wang; C. B. He;

  • 作者单位

    Institute of Materials Research and Engineering (IMRE),(A*STAR) Agency for Science, Technology and Research,3 Research Link, Singapore 117602;

    Institute of Materials Research and Engineering (IMRE),(A*STAR) Agency for Science, Technology and Research,3 Research Link, Singapore 117602;

    Institute of Materials Research and Engineering (IMRE),(A*STAR) Agency for Science, Technology and Research,3 Research Link, Singapore 117602;

    Institute of Materials Research and Engineering (IMRE),(A*STAR) Agency for Science, Technology and Research,3 Research Link, Singapore 117602;

    Institute of Materials Research and Engineering (IMRE),(A*STAR) Agency for Science, Technology and Research,3 Research Link, Singapore 117602,Department of Materials Science and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 聚合反应过程;
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