Liquid crystalline side group polyesters with a systematic variation of main chain and side group spacer length

✍ Scribed by Axel Böhme; Siegmar Diele; Jürgen Lindau

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 87 KB
• Volume: 200
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/(sici)1521-3935(19990101)200:1<166::aid-macp166>3.0.co;2-8

✦ Synopsis

To investigate the influence of a systematic variation of the length of main chain and side group spacers on the thermal phase behaviour four homologous series of liquid crystalline side group polyesters with 4-(phenylazo)azobenzene moieties as mesogenic side groups have been prepared and characterized. The polyesters exhibit smectic and/or nematic phases. The mesomorphic properties were studied by using optical polarizing microscopy, differential scanning calorimetry (DSC) and X-ray diffraction. Packing models of the low ordered smectic phases have been derived from X-ray data.