Molecular Engineering of Liquid Crystalline Polymers by 'Living' Polymerization 30. Synthesis and 'Living' Cationic Polymerization of (2R, 3S)-2-Fluoro-3-Methylpentyl 4'-(8-Vinyloxyoctyloxy) Biphenyl-4 Carboxylate and Its Copolymerization with (2R, 3S)-2-Fluoro-3- Methylpentyl 4'-(11-Vinyloxyundecanyloxy) Biphenyl-4-Carboxylate.
Abstract
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 prepared from 11-8 and (2R, 3S)-2- fluoro-3-methylpentyl 4'-( 11 vinyloxyundecanyloxy)biphenyl-4 carboxylate (11-11). The S(sub c*) phase of these copolymers displays a continuous dependence of copolymer composition. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 03, 1995
- Accession Number
- ADA293115
Entities
People
- H. Oda
- Virgil Percec
Organizations
- Case Western Reserve University