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Self-organization behaviours of hemiphasmidic side-chain liquid-crystalline polymers with different spacer lengths

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Abstract

A new and simple series of hemiphasmidic side-chain liquid crystalline polymethacrylates containing biphenyl mesogens with different spacer lengths, 4-[(3,4,5-tridecyloxy)-1-carbonylbenzoate]biphenyl-n-methacrylates (denoted as P-n-BP, n = 2, 4, 6, 8, and 10, n refers to the carbon number of spacers), were designed and successfully synthesized via free radical polymerization. As evidenced by POM, DSC and XRD results, P-2-BP and P-4-BP exhibited the hexagonal columnar (Φh) phase at room temperature, but for P-4-BP, there was a transition from the Φh1 phase to the highly ordered Φh2 phase before isotropization. With longer spacers, P-6-BP and P-8-BP formed a smectic phase at room temperature and transformed into the Φh phase at higher temperatures. For P-10-BP, it only shows a single transition from a smectic phase to an isotropic state. It may be attributed to the fact that the self-organization mechanism of P-n-BP is differential at various temperatures upon varying the spacer length.

Graphical abstract: Self-organization behaviours of hemiphasmidic side-chain liquid-crystalline polymers with different spacer lengths

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Publication details

The article was received on 25 Mar 2017, accepted on 14 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00991G
Citation: New J. Chem., 2017, Advance Article
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    Self-organization behaviours of hemiphasmidic side-chain liquid-crystalline polymers with different spacer lengths

    X. Yang, Z. Xiang, S. Chen, H. Luo, D. Zhang and H. Zhang, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00991G

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