Issue 8, 2002
From the journal:

Journal of Materials Chemistry

Ferroelectric liquid crystalline polyoxetanes bearing chiral dimesogenic pendants

Jun-Woo Lee,a   Dong Keun Oh,a   C. V. Yelamaggad,b   S. Anitha Nagamanib  and  Jung-Il Jin*a  

* Corresponding authors

a Division of Chemistry and Molecular Engineering, and Center for Electro- and Photo-Responsive Moleculer, Korea University, Seoul 136-701, Korea

b Center for Liquid Crystal Research, Bangalore 560013, India

Abstract

Two new polyoxetanes bearing dimesogenic pendants were prepared and their liquid crystalline properties were studied by differential scanning calorimetry (DSC), polarizing microscopy, and X-ray diffractometry. The dimesogens consist of cholesterol and biphenyl moieties connected through polymethylene spacers. Their biphenyl ends were attached to the oxetane monomer through a hexamethylene unit and the dimesogenic monomers were subjected to cationic ring-opening polymerization. The molecular weights of the polymers were very low and the degree of polymerization was only about 6. The two polymers were found to be thermotropic and formed only the chiral smectic C (Sc*) phase and, thus, their ferroelectricity was studied. Their spontaneous polarization values at the Sc* phase were about 20 nC cm−2 with responsive times of around 0.3 ms at 7 °C below the clearing temperature.

Graphical abstract: Ferroelectric liquid crystalline polyoxetanes bearing chiral dimesogenic pendants

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Article information

DOI
https://doi.org/10.1039/B202594A
Article type
Paper
Submitted
15 Mar 2002
Accepted
22 May 2002
First published
28 Jun 2002

J. Mater. Chem., 2002,12, 2225-2230

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Ferroelectric liquid crystalline polyoxetanes bearing chiral dimesogenic pendants

J. Lee, D. Keun Oh, C. V. Yelamaggad, S. Anitha Nagamani and J. Jin, J. Mater. Chem., 2002, 12, 2225 DOI: 10.1039/B202594A

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