Citation: SHEN Shuchang, CAI Junyang, WANG Lihong. Synthesis, Characterization and Chromatographic Performance of Schiff-base Type Silicone Polyurethane Liquid Crystal Polymer[J]. Chinese Journal of Applied Chemistry, ;2016, 33(9): 1085-1092. doi: 10.11944/j.issn.1000-0518.2016.09.150410 shu

Synthesis, Characterization and Chromatographic Performance of Schiff-base Type Silicone Polyurethane Liquid Crystal Polymer

1.
Analytical and Testing Center of Qiqihar University, Qiqihar, Heilongjiang 161006, China

Corresponding author: SHEN Shuchang,
Received Date: 23 November 2015
Available Online: 30 March 2016
Fund Project:

A new kind of small molecule Schiff base liquid crystal unit, p-phenylene(p-styrene acrylic oxo alcohol)imine was synthesized using hydroxybenzaldehyde, 3-chloropropanol, p-phenylenediamine as raw meterials. Schiff base type silicone polyurethane liquid crystal polymer was synthesized by the liquid crystal unit, 1,4-phenylene diisocyanate and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane. The construction of liquid crystal unit and the silicone liquid crystalline polymer were characterized by Fourier transform infrared spectrometry. The crystal structures of the liquid crystal unit and the Schiff base type silicone polyurethane liquid crystal polymer liquid crystal were identified by X-ray diffraction. The liquid crystal phase and phase transition temperature of the Schiff base type silicone polyurethane liquid crystal polymer were investigated by differential scanning calorimetry. The phase change process and optical properties of the liquid crystal material were observed by polarizing optical microscope. The chromatography column was made using Schiff base type silicone polyurethane liquid crystal polymer as stationary phase. The relative polarity of stationary liquid and the chromatographic separation performance for substituted benzene isomers were determined. Liquid crystal temperature ranges of the liquid crystal polymer are 103~146℃. It belongs to strongly polar stationary liquid(P_x=79), the separation degree of the chromatographic peaks are 0.96~3.33.
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沈阳化工大学材料科学与工程学院沈阳 110142