乙烷桥键类四环液晶早已得到广泛的应用,但是其介晶性能很少有系统的报道.本文采用DSC、POM测试,对新合成的两种含双乙烷桥键侧氟类和二苯乙炔类四环液晶单体(EA3E和EA5E)的介晶性进行了研究,并探讨了已有的乙烷桥键类四环液晶单体结构与性能之间的关系.结果发现,引入乙烷桥键的位置及数目对四环液晶热性能的影响较大,对其影响的规律与四环液晶的类型有关.说明在不同类型的四环液晶中,合理地引入乙烷桥键能够获得性能优异的液晶单体.
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