Thermomechanical properties of liquid‐crystalline epoxy networks arranged by a magnetic field
Thermomechanical properties of liquid‐crystalline epoxy networks arranged by a magnetic field
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磁场排列的液晶环氧树脂网络的热机械性能
DOI：
10.1002/polb.10740
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
H. Aoki
中科院分区：
文献类型：
--
作者：
M. Harada;M. Ochi;M. Tobita;T. Kimura;T. Ishigaki;Naoyuki Shimoyama;H. Aoki
在液晶环氧树脂固化过程中，施加较强的磁场，研究了固化树脂的热机械性能。用广角X射线衍射仪、动态力学分析和断裂韧性测试对固化体系的网络取向和力学性能进行了评价。发现固化体系具有沿外加电场方向排列的各向异性网络结构，并且各向异性反映在热力性能上。特别是，当网络链沿裂纹扩展方向排列时，系统的断裂韧性显著增加。
During the curing process of a liquid-crystalline epoxy resin, a relatively strong magnetic field was applied, and the thermomechanical properties of the cured resin were investigated. The network orientation and mechanical properties of the cured system were evaluated with wide-angle X-ray diffraction, dynamic mechanical analysis, and fracture toughness testing. The cured system was found to have an anisotropic network structure, which arranged along the applied field, and the anisotropy was reflected in the thermomechanical properties. In particular, the fracture toughness of the system dramatically increased when the network chains were arranged across the direction of the crack propagation.