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- W1981566306 abstract "The syntheses of 4-{2-[4′-(11-vinyloxyundecyloxy)biphenyl-4-yl]ethyl}benzo-15-crown-5 (12) and 4-{2-[4′-(11-methacryloylundecyloxy)biphenyl-4-yl]ethyl}benzo-15-crown-5 (14) and their respective cationic and radical polymerizations to yield liquid-crystalline poly(12) and poly(14) are described. Poly(12) with a degree of polymerization of 6 exhibits a monotropic smectic A (SA) phase, while the higher-molecular-weight polymers exhibit an enantiotropic SA phase. Poly(14) displays an enantiotropic SA and an unidentified higher-order smectic phase. Both poly(12) and poly(14) display crystalline phases also. The mesomorphic behaviour of the complexes of both polymers with NaSO3CF3 was investigated. Complexation increases the isotropization temperature of the highest temperature mesophase and decreases the temperature transition of crystalline and higher-order smectic phases. Therefore, this complexation transforms virtual and monotropic mesophases into enantiotropic mesophases and also increases the thermodynamic stability of the highest temperature mesophase. These results have demonstrated the ability of these polymers to self-regulate their phase behaviour via molecular recognition of metal salts by their 15-crown-5 receptor." @default.
- W1981566306 created "2016-06-24" @default.
- W1981566306 creator A5050859196 @default.
- W1981566306 creator A5084942404 @default.
- W1981566306 date "1993-01-01" @default.
- W1981566306 modified "2023-10-16" @default.
- W1981566306 title "Self-regulated phase transitions in poly(4-{2-[4′-(11-vinyloxyundecyloxy)biphenyl-4-yl]ethyl}benzo-15-crown-5) and poly(4-{2-[4′-(11-methacryloylundecyloxy)biphenyl-4-yl]ethyl}benzo-15-crown-5)via molecular recognition" @default.
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- W1981566306 doi "https://doi.org/10.1039/jm9930300083" @default.
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