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含苯基的环二硅氮烷聚硅氧烷共聚物(TMCDPS)主链上含有刚性结构,具有良好的耐热性能。将此材料用作毛细管气相色谱固定相,考察该固定相的柱效、极性、热稳定性,并对石蜡、聚乙烯裂解产物、原油等样品进行色谱分析。实验结果表明:该固定相有着良好的分离效果,属于中等极性固定相,其最为突出的特点就是在聚硅氧烷主链上引入大分子基团,使得其耐温性能大大提高,温度达到400℃时,柱流失量依然不高。
The phenyl-containing cyclic disilazane polysiloxane copolymer (TMCDPS) has a rigid structure on the main chain and has good heat resistance. The material was used as stationary phase of capillary gas chromatography, and the column efficiency, polarity and thermal stability of the stationary phase were investigated. The samples of paraffin, polyethylene cracker and crude oil were analyzed by chromatography. The experimental results show that the stationary phase has a good separation effect and belongs to the medium polar stationary phase. The most prominent feature of the stationary phase is that macromolecular groups are introduced into the main chain of the polysiloxane so that its temperature resistance can be greatly improved. When the temperature reaches 400 ℃, the column loss is still not high.