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研究了含ＣＦ３基团的液晶取向材料ＹＢ－２８、ＹＢ－２９产生的预倾角随摩擦强度增大而变小；随固化时间延长、固化温度升高而变大的依赖关系。同时，测试了它们的电子能谱，通过对二者电子能谱中Ｆ原子吸收量变化的分析，提出了一种新的液晶分子取向模型。
The results show that the pretilt angle of YB-28 and YB-29 containing CF3 groups increases with the increase of friction strength, but decreases with the increase of curing temperature and the increase of curing temperature. At the same time, their electronic spectra were tested. A new model of liquid crystal molecular orientation was proposed by analyzing the changes of F atoms in the two electronic spectra.