向列单体和弹性体弛豫速率的Vogel-fulcher依赖性

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Pub Date : 2000-12-01 DOI:10.1103/physreve.62.8100

Shenoy, Filippov, Aliev, Keller, Thomsen, Ratna

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引用次数: 6

摘要

介质弛豫光谱用于研究向列相单体和相应的交联聚合物向列相液晶(弹性体)中的弛豫过程。在10mhz至2ghz的频率窗内，单体液晶表现为单一弛豫，而聚合物表现为三个弛豫过程，其中两个被定量分析。在单体和聚合物中，弛豫时间的温度依赖性都遵循Vogel-Fulcher行为。用特定的分子运动来识别弛豫过程，并以线性近似计算活化能，以便与文献数据进行比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Vogel-fulcher dependence of relaxation rates in a nematic monomer and elastomer

Dielectric relaxation spectroscopy is used to study the relaxation processes in a nematic monomer and the corresponding cross-linked polymer nematic liquid crystal (elastomer). In the frequency window 10 mHz to 2 GHz the monomer liquid crystal shows a single relaxation whereas the polymer exhibits three relaxation processes, two of which are quantitatively analyzed. The temperature dependence of relaxation times in both the monomer and polymer follows a Vogel-Fulcher behavior. The relaxation processes are identified with specific molecular motions and activation energies are calculated in a linear approximation for comparison with literature data.

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Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

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