A hydrogen-bonding network or hydrogen-bonded cluster is formed in many hydrogen-bonded glass formers. It determines the dynamics of structural α relaxation and the Johari-Goldstein (JG) β relaxation because breaking of hydrogen bonds is the prerequisite. However, the networks and clusters can be substantially reduced or totally removed in the liquid state by high temperature accompanying the applied high pressure in experiments, and in the glassy state by hyperquenching the liquid under pressure. By confining the glass former in nanometer spaces, the extended network cannot form, and in addition the finite size effect limits the growth of the length scale of the α relaxation on lowering temperature. Any of these actions will modify the structure of the original hydrogen-bonded glass former, and also the intermolecular interaction governing the relaxation processes. Consequently the dynamics of the structural α relaxation and the JG β relaxation, as well as the relation between the two processes, are expected to change. An important advance in the study of the dynamics of glass-forming materials is the existence of the strong connection between the α relaxation and the JG β relaxation. In particular, the ratio of their relaxation times, $t_{\alpha }\left(T\right)/t_{\beta }\left(T\right)$, is quantitatively determined by the exponent of the Kohlrausch relaxation function of the α relaxation. This property is valid in hydrogen-bonded glass formers as well as in non-hydrogen-bonded glass formers. The interesting question is whether this property continues to hold after the hydrogen-bonded glass former has been modified by high temperature under high pressure, nanoconfinement, and hyperquenching under pressure. Remarkably, the answer is positive as concluded from the analyses of the data in several hydrogen-bonded glass formers reported in this paper. So far the main theoretical explanation of this property has been the coupling model.

中文翻译：

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通过压力，纳米约束和超淬火来解释氢键材料动力学的变化

在许多氢键玻璃形成剂中形成氢键网络或氢键簇。它决定了结构α弛豫和Johari-Goldstein（JG）β弛豫的动力学，因为氢键的断裂是先决条件。然而，在实验中，伴随着施加的高压，通过高温可以显着减少或完全除去网络和簇，而在压力下将液体超淬灭则可以在玻璃态显着减少或完全去除。通过将玻璃形成器限制在纳米空间中，无法形成扩展的网络，此外，有限的尺寸效应还限制了α弛豫的长度尺度随温度降低的增长。这些动作中的任何一个都会改变原始氢键玻璃成型器的结构，以及控制松弛过程的分子间相互作用。因此，预期结构α弛豫和JGβ弛豫的动力学以及这两个过程之间的关系会发生变化。玻璃形成材料动力学研究的重要进展是α弛豫与JGβ弛豫之间存在牢固的联系。特别是放松时间的比例，${Ť}_{\alpha }（Ť）/{Ť}_{\beta }（Ť）$由α弛豫的Kohlrausch弛豫函数的指数定量地确定。该性质在氢键结合的玻璃形成剂以及非氢键结合的玻璃形成剂中均有效。有趣的问题是，在高压下通过高温，纳米约束和在压力下进行超淬火对氢键玻璃形成剂进行改性后，该性能是否继续保持。值得注意的是，答案是肯定的，这是根据对本文报道的几种氢键玻璃形成器的数据分析得出的结论。到目前为止，对该特性的主要理论解释是耦合模型。