Topologically induced glass transition in dense polymer systems
Topologically induced glass transition in dense polymer systems
复制标题
致密聚合物体系中的拓扑诱导玻璃化转变
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. Schulz
中科院分区：
文献类型：
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作者：
Matthias Rosche;R. Winkler;P. Reineker;M. Schulz
通过蒙特卡罗模拟分析硬核聚合物体系中的玻璃化转变。所使用的方法基于一种新颖的连续波动键方法，该方法可以与球形硬核颗粒的众所周知的液体进行比较。结果表明，由于聚合物链的键（拓扑限制），硬核聚合物的玻璃化转变是一种被阻止的一级相变。分子动力学的特征减慢是局部有序结构形成的结果。此外，还检测到典型的温度依赖性 α 和 β 过程以及附加的强局部化且非常快的过程。
The glass transition in hard core polymer systems is analyzed by a Monte Carlo simulation. The method used is based on a novel continuous fluctuating bond method, which allows for the comparison with well-known liquids of spherical hard core particles. It is demonstrated that the glass transition of hard core polymers is a prevented first-order phase transition due to the bonds of the polymer chains (topological restrictions). The characteristic slow down of the molecular dynamics is a result of the formation of locally ordered structures. Furthermore, the characteristically temperature-dependent α and β processes and an additional strongly localized and very fast process are detected.