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EXPRESS: Raman Investigation of the Processing: Structure Relations in Individual Poly(ethylene terephthalate) Electrospun Fibers
Applied Spectroscopy ( IF 3.5 ) Pub Date : 2021-10-13 , DOI: 10.1177/00037028211049242
Arnaud W Laramée 1 , Catherine Lanthier 1 , Christian Pellerin 1
Affiliation  

Electrospun fibers often exhibit enhanced properties at reduced diameters, a characteristic now widely attributed to a high molecular orientation of the polymer chains along the fiber axis. A parameter that can affect the molecular organization is the type of collector onto which fibers are electrospun. In this work, we use polarized confocal Raman spectromicroscopy to determine the incidence of the three most common types of collectors on the molecular orientation and structure in individual fibers of a broad range of diameters. Poly(ethylene terephthalate) is used as a model system for fibers of weakly crystalline polymers. A clear correlation emerges between the choice of collector, the induced molecular orientation, the fraction of trans conformers, and the degree of crystallinity within fibers. Quantitative structural information gathered by Raman contributes to a general description of the mechanism of action of the collectors based on the additional strain they exert on the forming fibers.



中文翻译:

EXPRESS:加工的拉曼研究:单个聚(对苯二甲酸乙二醇酯)电纺纤维中的结构关系

电纺纤维通常在减小直径时表现出增强的性能,这一特性现在广泛归因于聚合物链沿纤维轴的高分子取向。可以影响分子组织的一个参数是静电纺丝纤维的收集器类型。在这项工作中,我们使用偏振共焦拉曼光谱显微镜来确定三种最常见类型的收集器对各种直径的单根纤维的分子取向和结构的影响。聚(对苯二甲酸乙二醇酯)用作弱结晶聚合物纤维的模型系统。收集器的选择、诱导的分子取向、反式构象体的比例和纤维内的结晶度之间出现了明显的相关性。

更新日期:2021-10-13
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