engleski

Smectic ordering in poly(4-maleimidocholesterylbenzoate), poly(6-maleimidocholesteryl-hexanoate) and alternating copolymers with styrene, alpha- and beta-methylstyrene and phenylvinyl ethyl ether

Poly(4-maleimidocholesterylbenzoate), poly(6-maleimidocholesterylhexanoate) and alternating copolymers with styrene, alpha- and beta-methylstyrene and phenylvinyl ethyl ether are birefringent in polarising optical microscope and show a sharp reflection at 1.49-1.73 nm and an amorphous halo at 0.55-0.57 nm. The absence of discrete reflections in WAXD indicates the smectic ordering, i.e. a frozen-in liquid crystalline phase. At lower angle a reflection at 3.53 nm appears for poly(4-maleimidocholesterylhexanoate-alt-styrene) thus indicating that the reflection at 1.71 nm is a 2nd order of the true periodicity of 3.5 nm for all studied polymers.

synthesis; maleimide; alternating copolymers; liquid crystals; smectic order

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