Characteristics of liquid‐crystalline cholesteryl and cyanobiphenyl side chains pendent totrans‐polypentenamer

摘要

Abstracttrans‐Polypentenamers with thermotropic liquid‐crystalline side chains cholesteryl and cyanobiphenyl were prepared by ring‐opening polymerization of vinylcyclopropane monomers with proper substituents. Molecular weights of the polymers were in the range of 25000 to 80000 and the ratios of weight‐ to number‐average molecular weightsMw/Mnwere between 3.3 and 3.8. The glass transition temperature values of the polymers were 35°C (4a) and 39°C (4b). Monomers3aand3bpresent cholesteric and smectic mesomorphism, respectively. On the other hand, polymers4aand4bpresent only a smecti