Thermal Expansion of a 60 mol% para-Hydroxybenzoic Acid/40 mol% Ethylene Terephthalate Liquid Crystalline Copolyester Oriented in a Magnetic Field
Thermal Expansion of a 60 mol% para-Hydroxybenzoic Acid/40 mol% Ethylene Terephthalate Liquid Crystalline Copolyester Oriented in a Magnetic Field
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热%20膨胀%20of%20a%2060%20mol%%20对羟基苯甲酸%20酸/40%20mol%%20乙烯%20对苯二甲酸酯%20液体%20结晶%20共聚酯%20取向%20in%20a%20磁性%20场
DOI：
10.1295/polymj.27.247
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发表时间：
1995
期刊：
影响因子：
2.8
通讯作者：
E. Ito
中科院分区：
文献类型：
--
作者：
Tsunehisa Kimura;T. Maeda;H. Sata;M. Yamato;E. Ito
研究了60 mol%对羟基苯甲酸/40 mol%对苯二甲酸乙二醇酯液晶在磁场（6 T）中的热膨胀。取向样品的高温膨胀系数表现出各向异性;它对取向方向为负（收缩），而对垂直于取向的方向为正（膨胀）。X-射线衍射分析表明，正膨胀系数是由于取向链平均间距的增加。
The thermal expansion is investigated for a 60 mol% para-hydroxybenzoic acid/40 mol% ethylene terephthalate liquid crystalline copolyester oriented in a magnetic field (6T). The high-temperature expansion coefficient of the oriented samples shows an anisotropy; it is negative (shrink) to the orientation direction, while it is positive (expand) to the direction perpendicular to the orientation. The X-ray diffraction measurement indicates that the positive expansion coefficient is attributed to the increase in the mean spacing of the oriented chains.