Topology Analysis of Chain Walking Polymerized Polyethylene: An Alternative Approach for the Branching Characterization by Thermal FFF
Topology Analysis of Chain Walking Polymerized Polyethylene: An Alternative Approach for the Branching Characterization by Thermal FFF
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DOI：
10.1021/acs.macromol.9b01410
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发表时间：
2019-11-26
期刊：
影响因子：
5.5
通讯作者：
Lederer, Albena
中科院分区：
文献类型：
--
作者：
Geisler, Martin;Smith, William C.;Lederer, Albena
采用热场流分馏（ThFFF）研究了不同分支结构的链走催化剂（cwPE）合成的一系列枝状聚乙烯的保留行为。这些大分子的保留行为与其分支有关。基于Soret系数的差异，建立了一种新的模型，将ThFFF作为基于光散射或粘度的分支计算方法的替代方法，用于新型短链支化聚乙烯的分支分析。
Thermal field-flow fractionation (ThFFF) was designed to investigate the retention behavior of a series of dendritic polyethylenes synthesized using a chain walking catalyst (cwPE) with variations in the branching architecture. The retention behavior of these macromolecules correlates with their branching. Based on differences in the Soret coefficient, a new model has been developed for the application of ThFFF as an alternative to the branching calculation approach based on light scattering or viscosity for the branching analysis of novel short-chain branched PEs.