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以对羟基苯甲醛、3-氯-1-丙醇、对苯二胺合成液晶基元—1,4-二(4-丙氧基醇苯亚胺基)苯,液晶基元与对苯二异氰酸酯和1,3-双(3-氨基丙基)四甲基二硅氧烷反应合成有机硅席夫碱聚氨酯液晶聚合物。采用红外光谱、X射线衍射、差式扫描量热分析、偏光显微镜、X射线能谱等手段对液晶聚合物的结构、热稳定性、液晶性能、元素组成及分布进行了测试与表征。用此液晶聚合物作为气相色谱固定液,制备成气相色谱填充柱,测定了该色谱柱的相对极性,苯取代物及二氯苯的同分体异构体的分离性能。该液晶聚合物作为色谱固定液具有较强的分离能力。
(4-propoxylated phenylimino) benzene was synthesized with p-hydroxybenzaldehyde, 3-chloro-1-propanol and p-phenylenediamine, Synthesis of Silicone Schiff Base Polyurethane Liquid Crystal Polymer with Isocyanate and 1,3-Bis (3-Aminopropyl) Tetramethyldisiloxane. The structure, thermal stability, liquid crystal properties, elemental composition and distribution of the liquid crystal polymer were tested and characterized by infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, polarized light microscopy and X-ray spectroscopy. The liquid crystal polymer was used as the stationary phase of the gas chromatography to prepare a gas chromatographic packed column, and the relative polarities of the chromatographic column, the separation performance of the benzene substituted products and the isomeric compounds of the dichlorobenzene were measured. The liquid crystal polymer as chromatographic fixative has strong separation ability.