通过允许快速热平衡的装置研究物理老化
Physical ageing studied by a device allowing for rapid thermal equilibration
摘要：
老化的有机玻璃的平衡液体状态进行了研究，通过测量的介电损耗，利用微调节器，其中温度是由Peltier元件控制的装置。与传统设备相比，新设备增加了近两个数量级的可观察到的老化时间跨度。五个有机玻璃形成液体的数据。一个“内部时钟”的存在证实了无模型测试表明，老化的结构是由相同的材料时间，控制的介电性能。在长时间内，弛豫不是拉伸的，而是简单的指数，并且在相同温度的上下跳跃之后的弛豫速率的极限之间没有“膨胀间隙”。
英文摘要：
Ageing of organic glasses to the equilibrium liquid state is studied by measuring the dielectric loss utilizing a microregulator where temperature is controlled by means of a Peltier element. Compared to conventional equipment the new device adds almost two orders of magnitude to the span of observable ageing times. Data for five organic glass-forming liquids are presented. The existence of an "inner clock" is confirmed by a model-free test showing that the ageing of structure is controlled by the same material time that controls the dielectric properties. At long times relaxation is not stretched, but simple exponential, and there is no "expansion gap" between the limits of the relaxation rates following up and down jumps to the same temperature.
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