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(Chin.J.Polym.Sci.) Polysiloxane Side-chain Liquid Crystalline Polymers Prepared by Alkyne Hydrosilylation  
(Chin.J.Polym.Sci.) Polysiloxane Side-chain Liquid Crystalline Polymers Prepared by Alkyne Hydrosilylation
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关键词: LCP  
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所属学科: 高分子化学
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We describe in this work an alkyne-hydrosilylation approach to synthesize a series of novel polysiloxane sidechain LCPs attaching end-on or side-on mesogenic side groups. Their properties are characterized by NMR, FTIR, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, polarized optical microscopy and small-angle X-ray scattering. These obtained alkenylsilane linked novel LCPs exhibit higher glass transition temperatures and clearing points, and especially display the tendency of forming smectic phases, in strong contrast with the nematic phases of their comparative conventional alkylsilane linked analogues, which manifests more rigid features of the alkenylsilane linkages and their significant influence on the mesomorphic properties.
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