标题： 从热体积膨胀角度研究渗透聚合物玻璃化转变的新方法 显示英文标题

标题： A New Approach to the Glass Transition of Percolated Polymers from the Perspective of Thermal Volume Expansion

摘要： 1995年，诺贝尔奖得主P.W. 安德森作出了如下令人瞩目的陈述：固体状态理论中最深奥且最有趣的未解问题是玻璃和玻璃转变的本质理论。 尽管在此期间出现了新的理论发展，但我们认为，到目前为止，这种情况仅有所改善。 其中一个主要原因是对实验边界条件的考虑不足。 一个核心的实验问题源于这样一个事实：在假设的静态玻璃转变附近和上方，达到热力学平衡所需的时间常数急剧增加。 如果这些平衡条件被破坏，就会出现额外的内热力学变量，这些变量通常会显著改变静态和动态磁化率，从而导致实验数据的误读。 例如，这提出了一个疑问，即在规范的玻璃转变过程中是否存在静态性质的变化，以及这些变化如何与动态前兆相关联。 在本文中，我们尝试使用一种称为温度调制光学折射计法的新实验方法，并结合温度跳跃技术来寻找这些问题的答案。 研究我们模型环氧树脂的玻璃转变行为总共需要大约两年的时间。 显示英文摘要

摘要： In 1995, the Nobel Price winner P.W. Anderson made the following remarkable statement: The deepest and most interesting unsolved problem in solid state theory is probably the theory of the nature of glass and glass transition. Although there have been new theoretical developments in the meantime, in our opinion, this situation has only improved marginally to date. One of the main reasons is the insufficient consideration of experimental boundary conditions. A central experimental problem arises from the fact that the time constants required to achieve thermodynamic equilibrium increase sharply in the vicinity of and above a hypothetical static glass transition. If these equilibrium conditions are violated, additional internal thermodynamic variables come into play that normally alter the static and dynamic susceptibilities significantly and thus lead to misinterpretations of the experimental data. This raises, for example, the question of whether there are static property changes during the canonical glass transition and how these correlate with dynamic precursors. In this article, we attempt to find answers to these questions using a new experimental method called temperature-modulated optical refractometry in combination with the temperature-jump technique. The total time required to investigate the glass transition behaviour of our model epoxy was approximately two years.