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arXiv 1506.04067cond-mat.softcond-mat.mtrl-sci
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单参数老化的直接测试

Direct tests of single-parameter aging

Tina Hecksher, Niels Boye Olsen, Jeppe C. Dyre

摘要:

本文提出了准确的数据,为物理老化的有机玻璃低于玻璃化转变探测后,监测以下数量的温度上升和下降跳跃:剪切机械共振频率(约360 kHz),在1 Hz的介电损耗,在10 kHz的介电常数的实部,和损耗峰值频率的介电β过程(约10 kHz)。所使用的设置允许保持温度恒定在100微开尔文内,并在温度跳变后的几秒钟内实现热平衡。数据符合一个新的简化版本的经典工具,Narayanaswamy老化形式主义,这使得它可以计算一个弛豫曲线直接从另一个没有任何拟合的分析功能。

英文摘要:

This paper presents accurate data for the physical aging of organic glasses just below the glass transition probed by monitoring the following quantities after temperature up and down jumps: the shear-mechanical resonance frequency (around 360 kHz), the dielectric loss at 1 Hz, the real part of the dielectric constant at 10 kHz, and the loss-peak frequency of the dielectric beta process (around 10 kHz). The setup used allows for keeping temperature constant within 100 micro Kelvin and for thermal equilibration within a few seconds after a temperature jump. The data conform to a new simplified version of the classical Tool-Narayanaswamy aging formalism, which makes it possible to calculate one relaxation curve directly from another without any fitting to analytical functions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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