Synthesis and Characterization of Mesogen-Jacketed Liquid Crystalline Polymers through Hydrogen-Bonding

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• 作者：Yiding Xu ; Wei Qu ; Qian Yang ; Jukuan Zheng ; Zhihao Shen ; Xinghe Fan ; Qifeng Zhou
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：March 27, 2012
• 年：2012
• 卷：45
• 期：6
• 页码：2682-2689
• 全文大小：523K
• 年卷期：v.45,no.6(March 27, 2012)
• ISSN：1520-5835

文摘

In an attempt to construct mesogen-jacketed liquid crystalline polymers through noncovalent interactions, poly(2-vinylbenzene-1,4-dioic acid) and five series of pyridine derivatives were synthesized as hydrogen-bonding donor and acceptors, respectively. The structures of the compounds were confirmed by ¹H NMR, FT-IR, and gel permeation chromatography. A series of complexes with the same degree of polymerization and polydispersity were obtained by mixing the hydrogen-bonding donor and acceptors. The hydrogen-bonds were confirmed by FT-IR spectra. We found that the rigidity and structures of pyridine derivatives and the strength of the hydrogen-bonding all influenced the liquid crystalline behaviors of the resulting complexes. Smectic A and columnar nematic phases were observed in complexes PPANCx and PPANNEC, respectively.