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Novel study on the liquid crystalline behavior of poly(methacrylate)s with biphenyl side groups

✍ Scribed by S. Koltzenburg; D. Wolff; J. Springer; O. Nuyken

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 465 KB
Volume: 36
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19981115)36:15<2669::aid-pola1>3.0.co;2-4

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✦ Synopsis

We report the synthesis and characterization of a series of liquid crystalline polymers substituted with the 4Ј-methoxybiphenyl-4-yloxy group. The spacer length is varied from 4 -8 methylene units. The materials are characterized by polarized light microscopy, differential scanning calorimetry, and X-ray analysis. All homologues show highly ordered phases. Additionally, the butylene polymer shows a broad nematic mesophase. For the first time, the narrow nematic phase of the hexylene homologue could be confirmed experimentally. X-ray analysis of the polymers made exact assignments of the low temperature phases possible, thus giving access to the analysis of the arrangement of the mesogenes within the layers. The pentylene homologue shows a distinct deviation from the behavior of the other polymers.

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