Abstract
The synthesis of side-chain cholesteric liquid crystalline elastomers containing crosslinking agent pentaerythriol tetra-p-allyloxybenzoate (M-1) and mesogenic monomer 4-cholesteryl-4’-undecenyloyloxybenzoate (M-2) is presented by hydrosilication reaction. The chemical structures of the monomers and liquid crystalline networks were confirmed by Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance (1H NMR) spectroscopy. Mesomorphic properties and phase behavior were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction measurements. The influence of crosslinking units on phase behavior was discussed. The networks containing less than 8 mol% of crosslinking units showed elasticity, reversible phase transition and cholesteric grandjean texture. The glass transition temperatures increased and clearing temperatures decreased with concentration of crosslinking units.
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Zhang, BY., Hu, JS., Wang, Y. et al. Synthesis and Properties of Side-Chain Cholesteric Liquid Crystalline Elastomers Containing Tetra-Vinyl Crosslinking Units. Polym J 35, 476–483 (2003). https://doi.org/10.1295/polymj.35.476
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DOI: https://doi.org/10.1295/polymj.35.476
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