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领域: | 临床生物化学/分子生物学,其他 | ||
样品: | 星形聚苯乙烯 | 项目: | 使用 390-LC 多检测器套件 (MDS),通过 GPC 黏度检测分析星形聚苯乙烯 |
参考: | - |
方案文件名 | 下载 |
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使用 390-LC 多检测器套件 (MDS),通过 GPC 黏度检测分析星形聚苯乙烯 |
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There has been increasing interest in the synthesis of star-branched polymers due to their unusual flow and viscosity properties compared to linear analogs. Starbranched polymers are constructed with several ‘arms’ radiating from a central core, either by preparing the individual arms and attaching them to a central molecule - the ‘arms first’ approach - or by growing the polymer arms from a central core - the ‘core first’ approach. Many commercial polymers can be constructed with a star-branched morphology relatively easily, but their characterization is still a challenge to the analytical chemist. Gel permeation chromatography (GPC) employing a concentration detector (typically a refractive index detector) combined with a viscometer can be used to measure not only the molecular weight of the materials but also to investigate the star-branched structure. The 390-MDS is ideal for this type of application since it was specifically designed to extract additional information from polymers by GPC. A series of PS star-branched polymers was analyzed, which had been synthesized by a ‘core first’ approach giving theoretical 5-, 14- and 21-arm structures.
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