Molecular Engineering of Liquid Crystalline Polymers by 'Living' Polymerization30. Synthesis and 'Living' Cationic Polymerization of (2R, 3S)-2-Fluoro-3-Methylpentyl 4'-(8-Vinyloxyoctyloxy) Biphenyl-4 Carboxylate and Its

摘要

The synthesis and 'living' cationic polymerization of (2R, 3S)-2-fluoro-3-methylpentyl 4'-(8-vinyloxyoctyloxy) biphenyl-4-carboxylate (11-8) are described. Poly(11-8)s with degrees of polymerization from 4.3 to 15.7 and polydispersities less than or equal to 1.19 were synthesized and characterized by differential scanning calorimetry (DSC) and thermal optical polarized microscopy. All poly(11-8)s exhibit an enantiotropic S(sub c*) and an unidentified smectic (S(sub 1) phase. Poly(11-8)s with DP less than or equal 11.5 exhibit an additional enantiotropic unidentified smectic (S(sub 2)) phase. No S(sub A) phase could be detected in any of poly(11-8)s. The nature of mesophases exhibited by poly(11-8) was confirmed by the investigation of the phase diagram of the copolymers