Novel side-chain liquid-crystalline copolymers (SCLCPs) were synthesized via the Pd(II) catalyzed alternating copolymerization of mesogenic 1-alkenes and carbon monoxide. For methoxybiphenyl mesogens, these copolymers exhibited highly ordered smectic E mesophases and high glass transition temperatures. The transition temperatures of these polymers were tuned by altering the spacer length or by dilution of mesogen-containing alkenes with 1-hexene. Polymers with cyanobiphenyl or methoxyazobenzene mesogens exhibited nematic mesophases. These polymers were the first ever nitrogen containing copolymers of this type. Increase of the spacer length or the 1-hexene content of methoxybiphenyl-containing copolymers resulted in a decrease of the surface polarity of spincoated films. The decomposition temperature of these SCLCPs started far above the isotropization temperature of the polymers.
|Journal||Macromolecular Chemistry and Physics|
|Publication status||Published - 2000|
Nieuwhof, R. P., Marcelis, A. T. M., Sudhölter, E. J. R., Wursche, R., & Rieger, B. (2000). Side-chain liquid-crystalline poly(ketone)s : effect of spacer length, mesogen type and mesogen density on mesomorphic behavior. Macromolecular Chemistry and Physics, 201(17), 2484-2492. https://doi.org/10.1002/1521-3935(20001101)201:17<2484::AID-MACP2484>3.0.CO;2-X