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Synthesis and characterization of novel ferroelectric liquid crystal polysiloxane containing undecanoyloxy spacer (I)
Author(s) -
Zhang Qizhen,
Xue Qingbin,
Yang Kongzhang
Publication year - 1996
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199602)7:2<129::aid-pat459>3.0.co;2-1
Subject(s) - materials science , differential scanning calorimetry , mesophase , liquid crystal , ferroelectricity , monomer , optical microscope , characterization (materials science) , crystallography , polarized light microscopy , analytical chemistry (journal) , scanning electron microscope , polymer , composite material , optics , dielectric , organic chemistry , nanotechnology , optoelectronics , thermodynamics , chemistry , physics
A novel side‐chain liquid crystal polysiloxane and its corresponding monomer were synthesized by the standard method. We ensured their structures were as expected and their purities were high by 1 H nuclear magnetic resonance and infrared measurements. They were studied by differential scanning calorimetry (DSC) for their thermal analysis and polarizing optical microscopy (POM) with hot stage for their textures and transition temperatures. The results showed good liquid crystal properties and low transition temperatures of the mesophase. X‐ray diffractions were done to research their layer structure and SmA and SmC * phases were assured, in good agreement with the results of the POM and DSC measurements. The optical rotation degree was also measured.