Supercritical fluid chromatography of a “monodisperse” polystyrene
Supercritical fluid chromatography of a “monodisperse” polystyrene
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“单分散”聚苯乙烯的超临界流体色谱
DOI：
10.1002/pol.1969.110071110
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发表时间：
1969
期刊：
影响因子：
--
通讯作者：
T. H. Gouw
中科院分区：
文献类型：
--
作者：
R. Jentoft;T. H. Gouw
超临界流体色谱已被发现是分离高分子量化合物的重要工具 (1, 2)。这种方法在高分辨率工作中的适用性最近通过开发与固体支持物结合的分区基板而得到增强，因此不溶解在移动相（3）中。在这封信中，我们希望报告该技术在解析市售“单分散”聚苯乙烯方面的能力。除了更高的分辨率外，分析时间比传统凝胶渗透色谱法缩短了一个数量级以上。图 1 显示了通过该技术在 600 标称分子量的聚苯乙烯上获得的色谱图。可以观察到十八个清晰解析的峰。该产品购自宾夕法尼亚州匹兹堡的Pressure Chemical Co.，据推测是通过阴离子聚合制备的窄链长分布低聚物(4, 5)。制造商的数据表表明平均粘度为 578 rt: 7% 且
Supercritical fluid chromatography has been found to be a valuable tool to fractionate high molecular weight compounds (1, 2). The applicability of this method for high resolution work has recently been enhanced by the development of partitioning substrates which are bonded to the solid support and, hence, are not dissolved in the moving phase (3). In this letter we wish to report the capability of this technique in the resolution of a commercially available “monodisperse” polystyrene. Besides the higher resolving power, analysis times are more than one order of magnitude shorter than for conventional gel permeation chromatography. Figure 1 shows a chromatogram obtained by this technique on a 600 nominal MW polystyrene. Eighteen clearly resolved peaks can be observed. This product, which was obtained commercially from Pressure Chemical Co., Pittsburgh, Pa., is supposedly a narrow chain length distribution oligomer prepared by anionic polymerization (4, 5). The manufacturer’s data sheet indicates a viscosity average an of 578 rt: 7% and