Abstract In this study, electrospun fibers of melt blended poly(lactic acid) and poly(ethylene glycol), (PLA)-PEG blends involving 10, 15 and 20 wt% PEG and their corresponding composites with organically modified montmorillonite, Cloisite 30B were prepared and characterized by x-ray diffraction, differential scanning calorimetry, thermogravimetry and direct pyrolysis mass spectrometry techniques. The narrower fiber diameters observed for the PLA-PEG fibers involving organoclay compared to the corresponding neat fibers were associated with the presence of quaternary ammonium salt as organic modifier increasing electrical conductivity. Strong evidence for phase separation during the electrospinning process was detected for PLA-PEG fibers. On the other hand, for PLA-PEG composite fibers, as a consequence of the diffusion of both PLA and PEG chains from the bulk polymer into the galleries between the silicate layers of the organoclay, the interactions between PLA and PEG chains were enhanced and both components showed similar thermal characteristics, indicating lack of phase separation. These interactions further inhibited the interactions between the PLA chains and organic modifier of the organoclay

中文翻译：

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聚乳酸/聚（乙二醇）纤维和有机粘土复合纤维的热降解

摘要 在本研究中，制备了聚乳酸和聚乙二醇熔融共混的电纺纤维，包括 10、15 和 20 wt% PEG 的 (PLA)-PEG 共混物及其与有机改性蒙脱石 Cloisite 30B 的相应复合材料。并通过 X 射线衍射、差示扫描量热法、热重法和直接热解质谱技术进行表征。与相应的纯纤维相比，涉及有机粘土的 PLA-PEG 纤维观察到的纤维直径更窄，这与作为有机改性剂增加导电性的季铵盐的存在有关。对于 PLA-PEG 纤维，在静电纺丝过程中检测到相分离的有力证据。另一方面，对于 PLA-PEG 复合纤维，由于 PLA 和 PEG 链从本体聚合物扩散到有机粘土的硅酸盐层之间的通道中，PLA 和 PEG 链之间的相互作用增强，两种组分显示出相似的热特性，表明缺乏相分离。这些相互作用进一步抑制了 PLA 链与有机粘土的有机改性剂之间的相互作用