Abstract
Thermotropic liquid crystalline and photoluminescent properties of semi-rigid homo- and copoly(ester imide)s composed of only both 3,3’,4,4’-biphenyltetracarboxdiimide and aliphatic chains without traditional mesogens, which were prepared by transesterification of N,N’-bismethyl ester derivatives and N,N’-bisalcohols of 3,3’,4,4’-biphenyltetracarboxdiimide, were evaluated by differential scanning calorimetry (DSC), polarizing microscope observation, powder X-Ray analyses, UV-vis absorption and PL spectrum measurements. These measurements suggested that polymers having decamethylene chain neighboring the imide ring and decamethylene chain-rich copolymers tend to form nematic phase and that they show maximum absorbances and blue-emission maxima arising from the 3,3’,4,4’-biphenyltetracarboxdiimide both in solutions and in films.
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