聚合物交叉连接器对液态异烯的网络结构,形态和性能的影响
Jishnu Nirmala Suresh1,2, Hans Liebscher3, Hartmut Komber4
1Institute of Materials Science, Faculty of Mechanical Science and Engineering, TUD Dresden University of Technology, 01062 Dresden, Germany.
Polymers
|February 26, 2025
概括
这项研究探讨了环氧-PPO交叉连接器如何影响液态异烯 (LIR) 网络. 最佳的交叉连接器水平可以提高机械性能和电机动作,但过量会导致由于泄漏电流增加而导致性能降低.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 电活性聚合物 电活性聚合物
背景情况:
- 液态异烯 (LIR) 功能化与酸是电机驱动器的一个有前途的材料.
- 控制交联网络结构对于优化这些弹性体的性能至关重要.
- 环氧末盖聚烯氧化物 (epoxy-PPO) 被研究为交叉连接剂,以量身定制LIR特性.
研究的目的:
- 调查不同环氧PPO交叉连接器含量对LIR网络结构,机械性能和电机械驱动的影响.
- 了解交叉连接器度,形态和性能之间的关系.
- 为了确定最佳的交叉连接器度,以提高执行器性能.
主要方法:
- 合成LIR与不同数量的环氧PPO (10-50 phr) 交联.
- 膨胀测试以确定网络密度.
- 拉伸应力-张力测试,以评估机械反应.
- 扫描电子显微镜 (SEM) 用于形态分析.
- 介电性质测量和介电弹性体执行器 (DEA) 测试.
主要成果:
- 观察到最密集的网络是在20phr环氧PPO (C-LIR-20) 时,这是最低的形式吸收所表明的.
- 拉伸反应显示从10到20phr的环氧PPO增加了刚度,然后在更高度下变软.
- SEM揭示了从纳米级同质性向微观级相分离的过渡,并增加了交叉连接器含量.
- 虽然环氧PPO提高了介电常数,但较高度 (30-50phr) 导致泄漏电流增加.
- C-LIR-10弹性体薄膜在17.5V/μm时实现了1.7%的辐射应变,由于泄漏,性能在较高的交叉连接剂量下降.
结论:
- 环氧PPO交叉连接器的数量显著影响LIR的网络结构,机械性能和电机性能.
- 一个最佳的交叉连接器度 (大约10-20 phr) 平衡网络密度,并最大限度地减少泄漏,以实现有效的执行.
- 过度的交叉连接器导致相位分离和泄漏电流的增加,阻碍了电机性能,尽管潜在的介电常数更高.
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