Rollet Marion, Pelletier Bérengère, Berek Dušan, Maria Sébastien, Phan Trang N T, Gigmes Didier
Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France.
Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France.
J Chromatogr A. 2016 Sep 2;1462:63-72. doi: 10.1016/j.chroma.2016.07.080. Epub 2016 Jul 29.
Liquid Chromatography under Limiting Conditions of Desorption (LC LCD) is a powerful separation tool for multicomponent polymer systems. This technique is based on a barrier effect of an appropriate solvent, which is injected in front of the sample, and which decelerates the elution of selected macromolecules. In this study, the barrier effects have been evaluated for triblock copolymers polystyrene-b-poly(ethylene oxide)-b-polystyrene (PS-b-PEO-b-PS) according to the content of polystyrene (wt% PS) and PEO-block molar mass. PS-b-PEO-b-PS samples were prepared by Atom Transfer Radical Polymerization (ATRP). The presence of respective parent homopolymers was investigated by applying optimized LC LCD conditions. It was found that the barrier composition largely affects the efficiency of separation and it ought to be adjusted for particular composition range of block copolymers.
极限解吸条件下的液相色谱法（LC LCD）是用于多组分聚合物体系的一种强大的分离工具。该技术基于一种合适溶剂的屏障效应，该溶剂在样品之前注入，可减缓选定大分子的洗脱。在本研究中，根据聚苯乙烯含量（聚苯乙烯重量百分比）和聚环氧乙烷嵌段摩尔质量，对三嵌段共聚物聚苯乙烯- b -聚环氧乙烷- b -聚苯乙烯（PS - b - PEO - b - PS）的屏障效应进行了评估。通过原子转移自由基聚合（ATRP）制备了PS - b - PEO - b - PS样品。通过应用优化的LC LCD条件研究了相应母体均聚物的存在情况。发现屏障组成在很大程度上影响分离效率，并且对于特定组成范围的嵌段共聚物应该进行调整。
