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Liquid crystals (LCs)/polymer composites are promising candidates for the next-generation of large-area processible and flexible electro-optical (E-O) materials due to their combination of the fast-responsive characteristics of LCs and the excellent physical properties of polymer. However, the current LCs/polymer system, represented by the polymer dispersed liquid crystals (PDLC), are suffering from...
Morphologies of polymer networks are playing a key role in affecting the electro-optical (E-O) properties of a polymer dispersed liquid crystals (PDLCs) material. In this paper, the relationships between the polymer morphologies and the E-O properties of PDLCs are investigated in an unexplored thermally curing system based on epoxy/low-molar-mass-mercaptan. The polymer morphologies in this curing...
A simple water-soluble pyrene-functionalized cationic polyelectrolyte poly(4- vinylpyridine) quaternary ammonium (P4VP-Py-Bu) was designed and synthesized from poly(4-vinylpyridine) by two-step quaternization with 1-(bromomethyl)pyrene and 1-bromobutane. The polymer could be bound with a single-stranded DNA (ssDNA) by electrostatic interactions and hydrophobic interactions to form a fluorescent complex...
A series of novel side-chain cholesteric liquid-crystalline elastomers based on polysiloxane and cholesterol derivate monomer were prepared by adopting a crosslinking agent containing binaphthalene group. The chemical structures and mesomorphic properties of the monomers and elastomers were confirmed by FT-IR, 1 H NMR, DSC and POM measurements. Worthily, the elastomers exhibited unusual temperature...
In this study, we demonstrate a novel method for fabricating a single layer cholesteric liquid crystal (CLC) film with non-uniform pitch distribution by utilizing the chiral polynetworks. A chiral monomer, the helical twist power (HTP) of which decreases with the increase of temperature, was synthesized. The temperature dependence of the pitch of the mixtures before and after polymerization was investigated...
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