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Journal of Materials Science

, Volume 45, Issue 1, pp 201–208 | Cite as

Synthesis and characterization of chiral liquid crystal polymers containing donor–acceptor group

  • Xiao-Zhi He
  • Bao-Yan ZhangEmail author
  • Fan-Bao Meng
  • Mei Tian
  • Qiang Mu
Article

Abstract

A series of new chiral side-chain liquid crystalline polymers with electron donor–acceptor action were prepared containing chiral monomer with donor group and nematic LC monomer with acceptor group. All polymers were synthesized by graft polymerization using polymethylhydrosiloxane as backbone. The mesomorphic properties were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), thermogravimetric analyses (TGA), and X-ray diffraction measurements (XRD). The chemical structures of monomers and polymers were confirmed by Fourier transform infrared (FTIR), proton nuclear magnetic resonance spectra (1H NMR and 13CNMR). M1 did not show liquid crystalline phase and M2 turned out nematic phase on heating and cooling cycle. Polymers P2P7 were cholesteric phase. Cholesteric phase and low glass temperature liquid crystalline polymers have been obtained, which offered the possibility of application. Experimental results demonstrated that the glass-transition temperatures rose and isotropization temperatures decreased and the ranges of the mesophase temperature reduced with increasing the content of chiral agent. All of the obtained polymers showed high thermal stability.

Keywords

Polarize Optical Microscopy Liquid Crystalline Polymer Acceptor Interaction Smectic Layer Acceptor Action 

Notes

Acknowledgements

The authors are grateful to National Natural Science Fundamental Committee of China, and HI-Tech Research and development program (863) of China. We also thank National Natural Science Fundamental Committee of China, China Postdoctoral Science Foundation, and Postdoctoral Science and Research Foundation of Northeastern University who all extended financial support of this work. Shen Yang Scientific and Technical Bureau Foundation.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Xiao-Zhi He
    • 1
  • Bao-Yan Zhang
    • 1
    Email author
  • Fan-Bao Meng
    • 1
  • Mei Tian
    • 1
  • Qiang Mu
    • 1
  1. 1.Center for Molecular Science and EngineeringNortheastern UniversityShenyangPeople’s Republic of China

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