Abstract

Using X-ray diffraction, electron microscopy, and differential scanning calorimetry, the structure and mechanical properties of tubes based on poly (L-lactide) microfibers obtained by electrospinning from a dichloroethane solution and designed for implantation in small diameter blood vessels during prosthetics are studied. It is shown that freshly formed microfibers have an amorphous structure and their heat treatment at a temperature of 70–160°С is accompanied by crystallization of the polymer. Microfibers consist of lamellas ~20 × 200 nm in size, and their crystallites, the sizes of which depend on the processing temperature and amount to 25–34 nm, are characterized by the α-modification. The mechanical characteristics of the obtained tubes are considered.

中文翻译：

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聚（L-丙交酯）超细纤维管的结构和热机械性能

摘要

使用X射线衍射，电子显微镜和差示扫描量热法，研究了通过电纺丝从二氯乙烷溶液中获得的聚（L-丙交酯）微纤维为基础的管的结构和力学性能，该管设计用于在修复期间植入小直径血管。结果表明，新形成的微纤维具有无定形结构，在70–160°С的温度下进行热处理会伴随聚合物的结晶。超细纤维由约20×200 nm的薄片组成，其微晶的大小取决于加工温度，其大小为25-34 nm，其特征在于α修饰。考虑获得的管的机械特性。