Two-Dimensional Chromatography for the Deformulation of Complex Copolymers
Two-Dimensional Chromatography for the Deformulation of Complex Copolymers
复制标题
用于复杂共聚物变形的二维色谱法
DOI：
10.1021/ba-1995-0247.ch017
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发表时间：
1995
影响因子：
3.2
通讯作者：
G. Schulz
中科院分区：
文献类型：
--
作者：
P. Kilz;R. Krüger;H. Much;G. Schulz
A totally automated characterization of complex copolymers and blends by two-dimensional (2D) liquid chromatography—size-exclusion chromatography (LC—SEC) is described. The analysis of a 16-component mixture of a star block copolymer with wide range of molar masses and chemical composition by gradient high-performance LC or SEC alone does not give correct information. An on-line combination of both methods leads to much improved resolution. All 16 components are separated in the 2D contour map, enabling accurate and easy integration. The 2D LC—SEC analysis of polyester samples revealed the existence of several end groups, previously undiscovered. These byproducts influence mechanical and physical-chemical properties of polyesters. 2D chromatography allows the comprehensive and reliable separation and deformulation of complex analytes with very high resolution. Depending on the task, different types of separation methods may be combined to give best results. 2D chromatography is a powerful tool that may be used to understand and correlate macroscopic behavior of complex polymers to the molecular level.
