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网络架构和构成对多域液晶弹性体的竞争影响

David Taeyeun Yang¹, Callie W Zheng¹, Chun Lam Clement Chan¹

¹Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States.

|March 2, 2026

概括

本研究探讨了网络结构如何影响液晶弹性体 (LCE). 较高的交叉链接增加了中原-脊柱合,影响了阴性-同位素过渡温度 (T_NI).

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
软物质物理学软物质物理学

背景情况:

液晶弹性体 (LCE) 由于液晶秩序和弹性网络的相互作用而表现出独特的特性.
了解LCE中阴性-同位素 (N-I) 过渡对于它们在响应性材料中的应用至关重要.

研究的目的:

调查组成和网络结构如何影响主链LCE中的N-I过渡温度 (T_NI).
阐明中原-脊柱合和中原稀释对LCE属性的竞争影响.

主要方法:

使用液晶寡合体和三或四功能非美索基因交叉链接剂合成LCE.
交叉连接剂度的系统变化和分数介质素含量.
热分析以确定T_NI和隐性过渡热量 (ΔH_NI,mes).

主要成果:

随着交叉链接的程度增加,中原体-脊柱合会增加,而交叉链接会导致中原体稀释.
T_NI是由合和稀释效应之间的平衡决定的.
在低度的交叉连接器中观察到交叉连接和ΔT_NI之间的直接相关性,对于三和四功能的交叉连接器有特定的范围.
与线性差异发生在高度的交叉连接器中.
根据分子量依赖的稀释效应观察到基于分数介质素含量.
确定了每克中位素的最大潜热量 (ΔH_NI,mes).

结论:

交叉连接的程度和交叉连接器类型显著影响LCE网络结构和T_NI.
半导体稀释起着至关重要的作用,特别是在更高的交叉连接剂度和不同的半导体含量时.
这些发现为为特定应用量身定制LCE属性提供了洞察力.

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