Synthesis and Properties of a Series of Mesogen-Jacketed Liquid Crystalline Polymers with Polysiloxane Backbones

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• 作者：Lanying Zhang ; Si Chen ; Han Zhao ; Zhihao Shen ; Xiaofang Chen ; Xinghe Fan ; Qifeng Zhou
• 刊名：Macromolecules
• 出版年：2010
• 出版时间：July 27, 2010
• 年：2010
• 卷：43
• 期：14
• 页码：6024-6032
• 全文大小：1118K
• 年卷期：v.43,no.14(July 27, 2010)
• ISSN：1520-5835

文摘

A series of mesogen-jacketed liquid crystalline polymers (MJLCPs) with polysiloxane backbones have been synthesized by hydrosilylation of polymethylhydrosiloxane with styrenic derivatives. Their properties were studied in detail by a combination of ¹H NMR, Fourier transform infrared spectroscopy, differential scanning calorimetry, polarized light microscopy, wide-angle X-ray diffraction, scanning electron microscopy, and contact angle measurements. Wide-angle X-ray diffraction results indicated that these MJLCPs based on highly flexible polysiloxane main chain could also self-assemble into supramolecular columnar nematic or smectic liquid crystalline phases compared with structurally similar MJLCPs having a polyethylene backbone, but their liquid crystalline ranges were narrowed significantly. Low contact-angle values of the MJLCPs could be attributed to the fact that the polysiloxane backbones were embedded in mesogenic side chains, which also confirmed the mesogen-jacketed model for MJLCPs.