Liquid crystal properties of a mesogenic polyacetylene, poly(11-[(4′-heptoxy-4-biphenylyl)carbonyloxy]-1-undecyne)

Jianxin Geng State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Fengxia Geng State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Jiku Wang State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Baocai Zhu State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Gao Li Corresponding author State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Enle Zhou State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China

Jacky Wing Department of Chemistry, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China

Yip Lam Department of Chemistry, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China

Ben Zhong Tang Department of Chemistry, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China

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Abstract

The liquid crystalline properties of a mesogenic poly(1-alkyne) and the corresponding monomer were studied using transmission electron microscopy, X-ray diffraction, polarizing optical microscopy and differential scanning calorimetry. The monomer exhibits a monotropic smectic A phase and a metastable crystalline phase. The rigid polymer backbones do not prevent the mesogenic moieties from packing into smectic A and B phases in the temperature ranges 127.6–74.1°C and 74.1°C–room temperature, respectively, on cooling from the isotropic melt.

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Liquid crystal properties of a mesogenic polyacetylene, poly(11-[(4′-heptoxy-4-biphenylyl)carbonyloxy]-1-undecyne)

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Liquid crystal properties of a mesogenic polyacetylene, poly(11-[(4′-heptoxy-4-biphenylyl)carbonyloxy]-1-undecyne)

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