New arylidene-siloxane polyethers: Liquid-crystalline and photosensitive properties

Carmen Racles, Anton Airinei, Vasile Cozan, Maria Cazacu, Istvan E. Sajo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

By polycondensation reactions, starting from α, ω-bis(chloromethyl)polydimethylsiloxanes with different molecular weights and 2,6-bis(4-hydroxybenzylidene)cyclohexanone, new polyethers were obtained. The structure of resulting polymers was confirmed by IR and 1H-NMR spectroscopy and their thermal properties and mesophase behavior were studied by TGA, DSC, and polarizing light microscopy. Depending on the length of the siloxane spacer, some of the obtained compounds exhibited thermotropic liquid-crystalline properties. A possible smectic texture was investigated by X-ray diffraction measurements at room temperature. A decrease of the transition temperatures values was observed as the spacer length increased. The photochemical behavior of the siloxane polyethers was studied by ultraviolet absorption spectroscopy.

Original languageEnglish
Pages (from-to)3093-3099
Number of pages7
JournalJournal of Applied Polymer Science
Volume90
Issue number11
DOIs
Publication statusPublished - Dec 9 2003

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Keywords

  • Liquid-crystalline polymers (LCP)
  • Photochemistry
  • Polyethers
  • Siloxane-arylidene
  • Thermal properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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