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Journal of Polymer Research

, Volume 6, Issue 2, pp 107–115 | Cite as

Mesomorphic behavior and microstructure of side chain liquid crystalline copolysiloxane polymers II. With an oligo(ethylene oxide) unit and a cyano unit in the side chain

  • Wei-Shan Lee
Article
  • 32 Downloads

Abstract

This manuscript proposes a packing arrangement model for a co-mesogenic sidechain liquid crystalline copolysiloxane polymer copoly[4-allyloxy-benzoic acid [4′-2-(2-methoxyethoxy) ethoxy] biphenyl]-4-y1 ester-co-4-allyloxy-[(4-cyano)-4′-phenyl] carboxyl benzoate ester (copoly [(MS3BDBE2)-co-(MCN)]x/y depending on the relative molar composition of each mesogen. From the analysis of the thermal data, X-ray diffraction data, and solid state NMR spin-lattice relaxation (TH) data, we have found two side chain molecules in the mesophase layer coming from the same or a different polymer backbone. They are presumed to be mixed and form a bilayer smectic C mesophase at lower MCN concentrations as well as at higher MCN concentrations.

Keywords

Liquid side chain crystalline copolysiloxane polymers Microstructure X-ray diffraction Differential scanning calorimetry Solid state NMR 

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Copyright information

© Springer Science+Business Media, Inc. 1999

Authors and Affiliations

  • Wei-Shan Lee
    • 1
  1. 1.Department of Chemical EngineeringCheng-Shiu Institute of TechnologyKaohsiungTaiwan, ROC

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