Thermotropic semi-rigid copoly(imide-carbonate)s composed of 3,4,3",4"-p-terphenyltetracarboxdi-imide and 3,4,3',4'-biphenyltetracarboxdi-imide rings
作者： Moriyuki Sato , Atsumi Kogawa
DOI: 10.1080/02678290050080896
关键词: Materials science 、 Imide 、 Differential scanning calorimetry 、 Liquid crystal 、 Mesogen 、 Copolymer 、 Thermotropic crystal 、 Miscibility 、 Condensation polymer 、 Crystallography 、 Organic chemistry
摘要: New semi-rigid copoly(imide-carbonate)s composed of 3,4,3",4"-p-terphenyltetracarboxdi-imide and 3,4,3',4'-biphenyltetracarboxdi-imide units neighbouring homologous penta- hexa-methylene spacer chains were prepared by melt polycondensation; the relationships between polymer structure liquid crystalline (LC) properties are discussed. Differential scanning calorimetry measurements, polarizing microscope observations, miscibility tests variable temperature X-ray analyses suggest that 3,4,3",4"-p-terphenyltetracarboxdi-imide-rich copolymers form thermotropic LC nematic smectic phases, but 3,4,3',4'-biphenyltetracarboxdi-imide-rich amorphous have no melts. Therefore, presence confers good mesogenic properties.
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