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- W2049652803 abstract "Abstract The synthesis and characterization of poly{11-[(4-cyano-4′-biphenyl)oxy]undecanyl vinyl ether-co-(2S, 3S)-(+)-2-chloro-3-methylpentyl 4′-(8-vinyloxyoctyloxy)biphenyl-4-carboxylate}X/Y {poly[(6–11)-co-(15–8)]X/Y} (where X/Y represents the molar ratio of the two structural units) and poly {(2S, 3S)-(+)-2-chloro-3-methylpentyl 4′-(8-vinyloxyoctyloxy)biphenyl-4-carboxylate-co-3-[(4-cyano-4′-biphenyl)oxy]propyl vinyl ether}X/Y poly[(15–8)-co-(6–3)]X/Y} with degree of polymerization of about 20 and molecular weight distribution of about 1·1 are described. The mesomorphic behaviour of all copolymers determined from both first, second and subsequent DSC scans was discussed as a function of composition. As determined from the second DSC scans, poly(6–11) exhibits enantiotropic smectic A (SA) and SX (unidentified smectic), poly(6–3) enantiotropic nematic, while poly(15–8) exhibits enantiotropic SA, chiral smectic C (SC*) and SX (unidentified smectic) mesophases. Poly[(6–11)-co-(15–8)]X/Y exhibit a SA phase over the entire range of compositions and a new induced SX phase for X/Y = 8/2 to 4/6. The SA phase displays a continuous dependence of copolymer composition with an upward curvature. Poly[(15–8)-co-(6–3)]X/Y with X/Y from 10/0 to 3/7 displays an enantiotropic SA mesophase with an upward curvature as their highest phase, while those with X/Y from 2/8 to 1/9 an enantiotropic cholesteric mesophase." @default.
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- W2049652803 date "1992-11-01" @default.
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- W2049652803 title "Molecular engineering of liquid crystal polymers by living polymerization. XXII. Synthesis and characterization of binary copolymers of 11-[4-cyano-4′-biphenyl)oxy]undecanyl vinyl ether with (2<i>S</i>, 3<i>S</i>)-(+)-2-chloro-3-methylpentyl 4′-(8-vinyloxyoctyloxy)biphenyl-4-carboxylate, and of (2<i>S</i>, 3<i>S</i>)-(+)-2-chloro-3-methylpentyl 4′-(8-vinyloxyoctyloxy)biphenyl-4-carboxylate with 3-[4-cyano-4′-biphenyl)oxy]propyl vinyl ether" @default.
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- W2049652803 doi "https://doi.org/10.1080/02678299208029118" @default.
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