Kamath Sudesh Y, Colby Ralph H, Kumar Sanat K
Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Jan;67(1 Pt 1):010801. doi: 10.1103/PhysRevE.67.010801. Epub 2003 Jan 13.
The controversial origins of the unusual dynamics of miscible polymer blends are incisively probed through computer simulations. The distribution of mobilities experienced by a probe monomer in a miscible blend of chains with disparate glass transition temperatures is found to be much broader than in the pure polymers, providing clear evidence for local concentration variations in the mixture. These concentration fluctuations yield distinctly different temperature dependences for the dynamics of the two different components, in a manner that closely mimics experiments.
通过计算机模拟深入探究了可混溶聚合物共混物异常动力学的争议性起源。发现在具有不同玻璃化转变温度的链的可混溶共混物中，探针单体所经历的迁移率分布比在纯聚合物中要宽得多，这为混合物中的局部浓度变化提供了明确证据。这些浓度波动使得两种不同组分的动力学具有明显不同的温度依赖性，其方式与实验结果非常相似。
