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

doi:10.11944/j.issn.1000-0518.2016.09.150410

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (9): 1085-1092.DOI: 10.11944/j.issn.1000-0518.2016.09.150410

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

SHEN Shuchang(),CAI Junyang,WANG Lihong

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

Received:2015-11-23 Accepted:2016-03-30 Published:2016-08-23 Online:2016-08-23
Contact: SHEN Shuchang
Supported by:
Supported by the Natural Science Foundation of Heilongjiang Province of China(No.B201101)

Abstract

Abstract:

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.

Key words: organic silicone, Schiff base polyurethane liquid crystal, chromatographic stationary phase, structural characterization, chromatographic separation performance

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.

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

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