Side-chain liquid-crystalline poly(ketone)s : effect of spacer length, mesogen type and mesogen density on mesomorphic behavior

R.P. Nieuwhof, A.T.M. Marcelis, E.J.R. Sudhölter, R. Wursche, B. Rieger

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)2484-2492
JournalMacromolecular Chemistry and Physics
Volume201
Issue number17
DOIs
Publication statusPublished - 2000

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