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First observation of a columnar mesophase in a carborane-containing main-chain semiflexible copolymer

✍ Scribed by Evgueni M. Antipov; Valeri A. Vasnev; Manfred Stamm; Erhard W. Fischer; Nikolai A. Platé

Book ID
101304637
Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
59 KB
Volume
20
Category
Article
ISSN
1022-1336

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✦ Synopsis

A comparison of the structure and phase composition of a recently synthesized carborane-containing copolymer and its wholly organic analogue was carried out by DSC and X-ray analysis in a wide temperature range between 20 -300 8C. It is found that the incorporation of 10 mol-% of m-carboranedicarboxylic units in the polymer prepared from 4,49-dihydroxybiphenyl and sebacic acid, acting as mesogen and flexible spacer, respectively, leads to the formation of a columnar mesophase at elevated temperatures. This newly observed phase occurs in addition to the crystalline and liquid crystalline smectic phases known for the wholly organic analogue.

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