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Quantifying separation energy with a modified Capillary Break-up Extensional Rheometer (CaBER) to study polymer solutions
Soft Materials ( IF 1.6 ) Pub Date : 2020-07-28 , DOI: 10.1080/1539445x.2020.1792929
Kamran Riazi 1 , Mahdi Abbasi 1 , Christopher O. Klein 1 , Ingo F. C. Naue 1 , Manfred Wilhelm 1
Affiliation  

ABSTRACT

A Capillary Break-up Extensional Rheometer (CaBER) was modified to enable measurements of the axial force in combination with the related displacement. This makes it possible to determine the separation energy WsepN, the tackiness, of a polymer solution between two parallel plates with the CaBER. Separation energies of solutions of linear polystyrene, comb polystyrene and linear poly(methyl methacrylate) in dimethylformamide were measured as model systems. For linear polymers at a critical polymer concentration, there was a drastic change in slope of the separation energy WsepNc. This critical concentration was shown to be the minimum concentration at which continuous bead-free fibers could be electrospun.



中文翻译:

使用改进的毛细管破裂延伸流变仪(CaBER)定量分离能以研究聚合物溶液

摘要

修改了毛细管破裂流变仪(CaBER),以结合相关位移测量轴向力。这样就可以确定分离能w ^sËpñ使用CaBER在两块平行板之间的聚合物溶液的粘性。测量线性聚苯乙烯,梳状聚苯乙烯和线性聚(甲基丙烯酸甲酯)在二甲基甲酰胺中的溶液的分离能。对于处于临界聚合物浓度的线性聚合物,分离能的斜率发生了急剧变化w ^sËpñC。该临界浓度显示为可连续纺丝无珠纤维的最低浓度。

更新日期:2020-07-28
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