电聚酸-聚 ((ε-卡普罗拉克) 纤维:结构特征和细分动态反应
Svetlana G Karpova1, Anatoly A Olkhov1,2, Ivetta A Varyan1,2
1Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia.
Polymers
|May 25, 2024
概括
这项研究探讨了聚乙烯 (PLA) 和聚乙烯 (PCL) 纤维,揭示了混合如何影响结晶性和分子动力学. 确定了一个关键的组合范围用于相位逆转,这对于材料性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物材料工程 生物材料工程
背景情况:
- 电超薄纤维对于各种应用至关重要.
- 了解聚合物混合物中的分子相互作用对于定制材料特性至关重要.
- 聚乙烯 (PLA) 和聚乙烯 (PCL) 是具有明显特征的生物相容聚合物.
研究的目的:
- 为了研究电PLA/PCL混合纤维的结构和动态特性.
- 为了确定不同PLA/PCL比率对聚合物混合物特性的影响.
- 为了识别表现相位逆转的特定混合物成分.
主要方法:
- 使用各种PLA/PCL比率 (0/100到100/0) 制造电纤维.
- 使用差分扫描热量计 (DSC) 进行热量分析.
- 电子自旋共振 (ESR) 光谱与一个稳定的TEMPO激素探针.
主要成果:
- 在混合后观察到PLA/PCL结晶度,细分流动性和TEMPO探针吸附的显著变化.
- 评估了TEMPO基旋转在晶体间区域的激活能量.
- 一个特征性的组成范围 (50/50到30/70%的PLA/PCL) 显示了PLA从分散介质向离散阶段的反转过渡.
结论:
- 在分子层面上,PLA与PCL的比例显著影响混合纤维的结构和动态特性.
- 这项研究提供了关于PLA/PCL混合物的相位行为和分子动态的见解.
- 这些发现对于设计具有可控性质的基于PLA/PCL的先进材料至关重要.
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