Abstract
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.
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