...
首页> 外文期刊>ACS Macro Letters >Fast Polymer Diffusion through Nanocomposites with Anisotropic Particles
【24h】

Fast Polymer Diffusion through Nanocomposites with Anisotropic Particles

机译:通过具有各向异性粒子的纳米复合材料的快速聚合物扩散

获取原文
获取原文并翻译 | 示例
           

摘要

Polymer nanocomposites (PNCs) have characteristic length scales associated with both the nanoparticles (i.e., size and interparticle distance) and the polymer molecules (i.e., tube diameter of entanglement and radius of gyration; Rg). When the nanoparticle (NP) and polymer length scales are comparable, the polymer dynamics exhibit contrasting behavior for NPs differing only in size and shape. For spherical NPs and short anisotropic NPs, the polymer diffusion coefficient decreases monotonically with NP concentration. However, for long anisotropic NPs, polymer diffusion slows down at low NP concentration and recovers for NP concentrations above the critical concentration for network formation. By spanning intermediate ranges of nanoparticle size and shape, the role of the NP geometric parameters on the polymer dynamics is substantially advanced, thereby providing new routes toward controlling polymer dynamics and viscoelasticity of PNCs.
机译:聚合物纳米复合材料(PNC)具有与纳米颗粒(即尺寸和颗粒间距离)和聚合物分子(即,管的缠结直径和回转半径; Rg)相关的特征长度尺度。当纳米粒子(NP)和聚合物的长度比例相当时,对于仅尺寸和形状不同的NP,聚合物动力学表现出相反的行为。对于球形NP和短各向异性NP,聚合物扩散系数随NP浓度单调降低。但是,对于长各向异性的NP,聚合物的扩散在低NP浓度下会减慢,并在高于网络形成临界浓度的NP浓度下恢复。通过跨越纳米颗粒尺寸和形状的中间范围,NP几何参数对聚合物动力学的作用被大大提高,从而为控制PNC的聚合物动力学和粘弹性提供了新的途径。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号