Synthesis and Mesomorphic Behavior of Poly((2S, 3S)-(+)-2-Chloro-3- Methylpentyl 4'-(Omega-Vinyloxyalkyloxy)biphenyl-4-Carboxylate)s with Ethyl and Propyl Alkyl Groups
CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE
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The synthesis and cationic polymerization of 2S, 3S--2-chloro-3- methylpentyl 4-2-vinyloxyethyloxybiphenyl-4-carboxylate 15-2 and 2S, 3S- -2-chloro-3-methylpentyl 4-3-vinyloxyethyloxybiphenyl-4-carboylate 15-3 are described. The mesogenic behavior of the resulting polymers is discussed as a function of the molecular weight and spacer length. Based on the second and subsequent heating and cooling scans, poly15-2s exhibit an enantiotropic Sx unidentified smectic phase. Poly 15-3s show an enantiotropic cholesteric phase and an inverse monotropic Sx phase.
- Organic Chemistry
- Physical Chemistry
- Polymer Chemistry