A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Chromatography Lab, Moscow, Russia.
J Sep Sci. 2018 Sep;41(17):3404-3410. doi: 10.1002/jssc.201800154. Epub 2018 Jul 30.
The thermal stability of poly[1-(trimethylsilyl)-1-propyne] is investigated by heating the capillary column with this polymer as the stationary phase with the subsequent separation of the test mixture of light hydrocarbons. It is shown that heating of the column up to 130°C does not cause a decrease in efficiency or in the retention time of solutes. A further increase in temperature results in both decrease in column efficiency and sorbate retention. However, a decrease in column retentivity goes in one way for all the tested hydrocarbons. At the same time, the efficiency of the column is changed to a lesser degree for methane and ethane up to the temperature of polymer degradation, while for propane, butane, and iso-butane the difference is rather sharp. The most expressed decrease in efficiency was found for iso-butane: the column efficiency for this sorbate versus temperature of heating had two stages. The diffusion coefficients for sorbates in the polymeric phase were also evaluated and the sharp decrease in their values was found after the column heating.
通过加热带有这种聚合物作为固定相的毛细管柱来研究聚[1-(三甲基甲硅烷基)-1-丙炔]的热稳定性，随后对轻烃的测试混合物进行分离。结果表明，将柱子加热到 130°C 不会导致效率或溶质保留时间降低。进一步提高温度会导致柱子效率和溶质保留都会降低。然而，对于所有测试的烃类，柱子的保留能力都会以相同的方式下降。同时，对于甲烷和乙烷，柱子的效率在聚合物降解温度之前变化较小，而对于丙烷、丁烷和异丁烷，差异则相当明显。对于异丁烷，效率下降最为明显：这种溶质的柱子效率与加热温度之间存在两个阶段。还评估了溶质在聚合物相中的扩散系数，发现柱子加热后这些值急剧下降。
