Influence of cooling rates on phase transitions of bent-core liquid rystal 1,3-phenylene-bis4-(hexylcarboyloxyl)benzylideneamine
The influence of cooling rate on the phase transitions of a three-benzene-ring containing bent-core liquid crystal 1,3-phenylene-bis4(hexylcarboyloxyl)benzylideneamine has been investigated by means of differential scanning calorimetry and polarized optical microscopy. Our results show that the cooling rates in the second cooling run pose significant effects on the phase transitions of the bent-core liquid crystal despite the cooling rates in the first cooling run pose little effects on the phase transitions. In the second cooling run, the banana phases survived only when the cooling rates were in the range of 14～15℃/min whereas both slow cooling rates which were less than 13℃/min and fast cooling rates which were higher than 16℃/min made the banana phases disappeared.
Banana-shaped liquid crystal Cooling rate Banana phase Phase transition
Yuan Ming Huang Qing-lan Ma Bao-gai Zhai
College of Physics & Electronic Information, Yunnan Normal University, Yunnan 650092, China Modern Educational Technology Center, Yunnan Normal University, Yunnan 650092, China
国际会议
2009 International Symposium on Liquid Crystal Science and Technology(2009国际液晶科技研讨会)
昆明
英文
247-250
2009-08-02（万方平台首次上网日期，不代表论文的发表时间）