Novel behavior of the chromatographic separation of linear and cyclic polymers.
Novel behavior of the chromatographic separation of linear and cyclic polymers.
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DOI：
10.1007/s00216-015-9198-9
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发表时间：
2016-01
影响因子：
4.3
通讯作者：
Hercules DM
中科院分区：
文献类型：
--
作者：
Montenegro-Burke JR;Bennett JM;McLean JA;Hercules DM
在各种聚合过程中，形成各种各样的链，不仅在长度上，而且在化学组成上，广泛地使全面的聚合物表征复杂化。在这篇文章中，我们比较了不同的固定相和移动的相，通过尺寸排阻色谱-质谱法（SEC-MS）分析复杂的聚合物混合物。据我们所知，我们报告了新的色谱效果的线性和环状低聚物的聚酯（PE）和聚氨酯（PUR）的分离。对于两种聚合物类型，用单一溶剂系统（ACN）实现了不同结构的完全分离，而无需广泛的优化。此外，发现环状物质与其线性对应物相比显示出相反的洗脱曲线，表明物质之间具有不同的物理性质。
In various polymerization processes, the formation of a wide variety of chains, not only in length but also in chemical composition, broadly complicates comprehensive polymer characterization. In this communication, we compare different stationary and mobile phases for the analysis of complex polymer mixtures via size-exclusion chromatography-mass spectrometry (SEC-MS). To the best of our knowledge, we report novel chromatographic effects for the separation of linear and cyclic oligomers for polyesters (PE) and polyurethanes (PUR). A complete separation for the different structures was achieved for both polymer types with a single solvent system (ACN) and without extensive optimization. Additionally, cyclic species were found to show an inverse elution profile compared to their linear counterparts, suggesting distinct physical properties between species.