液晶苯酚酯相变内耗峰与振动频率的相关性

FREQUENCY DEPENDENCE ON INTERNAL FRICTION PEAK ASSOCIATED WITH PHASE TRANSITION OF LIQUID CRYSTAL CARBOXYLATE

采用低频内耗方法，在强迫振动模式下研究了液晶苯酚酯材料相变过程内耗峰与振动频率之间的相关性．由一个简单的粘弹性的Ｍａｘｗｅｌ模型出发，推导了在强迫振动模式下内耗峰的峰高与频率的关系式．从理论上得出了内耗峰高与振动频率之间的非线性关系．实验数据拟合的结果很好地符合这一关系式．

Abstract The phase transition of liquid crystal carboxylate is studied by using low frequency internal friction method, under forced vibration mode. A relationship between the height of the peak of internal friction and the vibration frequency is derived with a simple viscoelastical Maxwell model; it shows a nonlinear feature. The experimental result agrees with this relationship.