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首页> 外文期刊>Physica, B. Condensed Matter >Diffusion of compact macromolecules through polymer meshes: mesh dynamics and probe dynamics
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Diffusion of compact macromolecules through polymer meshes: mesh dynamics and probe dynamics

机译:紧凑型高分子通过聚合物网格的扩散:网格动力学和探针动力学

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摘要

The diffusion of compact macromolecules in polymer networks is examined to understand how polymer networks or gels could be used to filter different types of macromolecules. We present new measurements of the network and probe dynamics by neutron spin-echo spectroscopy (NSE). The investigated system consists of the protein a-lactalbumin (R-g = 15.2 Angstrom) as probe and a network of high molecular weight polyethylenoxide. The high molecular weight ensures a long disentanglement time for the polymer in order to create a stable network. We compare the network dynamics and the dynamics of the probe protein in the network at different mesh sizes. We study the dynamics at different q values between 0.03 and 0.22 Angstrom(-1). The corresponding length scales reach from distances smaller than the mesh size to larger than the mesh size. (C) 2004 Elsevier B.V. All rights reserved.
机译:研究了紧凑型大分子在聚合物网络中的扩散,以了解如何使用聚合物网络或凝胶过滤不同类型的大分子。我们通过中子自旋回波谱(NSE)提出了网络的新测量和探针动力学。研究的系统由蛋白质α-乳白蛋白(R-g = 15.2埃)作为探针和高分子量聚环氧乙烷网络组成。高分子量确保了聚合物长的解缠时间,以形成稳定的网络。我们比较了网络动力学和不同网格大小的网络中探针蛋白的动力学。我们研究了在0.03和0.22埃(-1)之间的不同q值下的动力学。相应的长度比例从小于网格大小的距离到大于网格大小的距离。 (C)2004 Elsevier B.V.保留所有权利。

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