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Abstract
In order to explore the motion of low molecular compound (LMW) of which chemical structure is similar to the mesogenic groups of liquid crystalline main-chain (LCP) in LCP/LMW composite system was studied by means of dielectric measurements and director order parameter (Sd) determinations by dielectric relaxation spectroscopy. The unaligned PLC exhibits a dielectric absorption of the α-relaxation process occurs in the glassy state. On the other hand, the unaligned material including 40 mol% of LMW in composite system exhibits a new dielectric absorption, which is based on the λ-relaxation process as judged by the activation energy. The director order parameter (Sd) varied from 0.16 to -0.30. It found that the dielectric behavior of the PLC/LMW composite system is very similar to that of liquid crystalline side-chain polymers.