This work aims at producing and investigating, for the first time, the microstructural and thermo-mechanical properties of fibers constituted by poly(lactic acid) (PLA)/poly(alkylene furanoate)s (PAFs) blends for textile applications. Two different PAFs have been investigated, i.e., poly(octylene furanoate) (P8F) and poly(dodecylene furanoate) (P12F), which have been blended with PLA in different concentrations and spun through a lab-made wet spinning device. The microstructural investigation of the fiber cross-section evidenced domains of PAFs homogeneously dispersed within the PLA matrix. The immiscibility of the produced blends was also suggested by the fact that the glass transition temperature of PLA was unaffected by the presence of PAF. The thermal stability of PLA was not substantially influenced by the PAF content, whereas the water absorption tendency decreased with an increase in P12F fraction. The mechanical properties of PLA/P8F blends decreased with the P8F amount, while for PLA/P12F fiber blends the stiffness and the strength were approximatively constant by increasing the P12F content. The drawing process, performed at 70 °C and with two different draw ratios, brought an interesting increase in the mechanical properties of PLA fibers upon P12F introduction. These promising results constitute the basis for future research on these innovative bio-based fibers.

这项工作的目的是首次生产和研究由用于纺织用途的聚（乳酸）（PLA）/聚（呋喃烯酸亚烷基酯）（PAFs）共混物构成的纤维的微观结构和热机械性能。已经研究了两种不同的PAF，即聚呋喃甲酸辛二酯（P8F）和聚呋喃甲酸十二烷基酯（P12F），它们已与PLA以不同浓度混合并通过实验室制造的湿纺装置纺丝。纤维横截面的微观结构研究表明，PAFs域均匀地分散在PLA基质中。PLA的玻璃化转变温度不受PAF的存在的影响，也表明了所生产的共混物的不溶混性。PLA的热稳定性基本上不受PAF含量的影响，而吸水趋势随着P12F分数的增加而降低。PLA / P8F共混物的机械性能随P8F含量的增加而降低，而对于PLA / P12F纤维共混物，通过增加P12F的含量，其刚度和强度近似恒定。在70°C下以两种不同的拉伸比进行拉伸过程，在引入P12F后，PLA纤维的机械性能有了显着提高。这些有希望的结果构成了对这些创新的生物基纤维进行未来研究的基础。在70°C下以两种不同的拉伸比进行的试验，在引入P12F后带来了PLA纤维机械性能的显着提高。这些有希望的结果构成了对这些创新的生物基纤维进行未来研究的基础。在70°C下以两种不同的拉伸比进行的试验，在引入P12F后带来了PLA纤维机械性能的显着提高。这些有希望的结果构成了对这些创新的生物基纤维进行未来研究的基础。