Novel side-chain liquid-crystalline poly(meth)acrylates were synthesized using 1-(3-hydroxyl-propyl)-3-[(4'-cyano-p-terphenyloxycarbonyl)alkyl]-1,1,3,3-tetramethyldisiloxane as the key intermediate. The polymers used a disiloxanemoiety as decoupling spacer with cyano-p-terphenyl as mesogenic unit. The products were characterized by NMR, GPC,DSC and polarizing optical microscopy. All the polymers with cyano-p-terphenyl mesogens formed a stable mesophase.However, if the mesogenic unit is replaced by cyano-p-biphenyl, the liquid crystalline character will be lost. The results alsoshowed that the decoupling is incomplete even if a complex and very flexible decoupling spacer is deliberately incorporatedto obtain the highest possible decoupling effect.
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机译:preparation and Characterization of side-Chain Liquid-Crystalline polyoxetanes anchoring a pendant spacer-separated mesogen at the Tertiary-Like C-3 Carbon of the Oxetane Unit