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Structure and Property Changes in Preparation and Post-Processing of P(3HB-co-4HB) Fiber

机译：P（3HB-co-4HB）纤维制备及后处理的结构和性能变化

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This paper analyzed the thermal performance of poly (3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and observed the crystallization morphology of P(3HB-co-4HB) by polarizing microscopy (POM). P(3HB-co-4HB) fiber crystallization peaks and crystallinity were characterized by X-ray diffraction (XRD). In addition, the influence of fiber storage time on mechanical properties was studied, and the influence of temperature and time of heat setting on the orientation structure, mechanical properties, and dry shrinkage ratio were explored. Tensile strength was found to increase with extended storage time. A fiber heat setting of 70°C gave optimal orientation degree and mechanical properties. A fiber heat setting of 80°C for 40 min gave the lowest dry shrinkage ratio. The elastic recovery ratio of fiber with 50% elongation was 83.42%.
机译：本文通过差示扫描量热法（DSC）和热重分析（TGA）分析了聚（3-羟基丁酸酯-co-4-羟基丁酸酯）[P（3HB-co-4HB）]的热性能，并观察了P的结晶形态。 （3HB-co-4HB）的偏光显微镜（POM）。通过X射线衍射（XRD）表征了P（3HB-co-4HB）纤维的结晶峰和结晶度。此外，研究了纤维贮存时间对机械性能的影响，探讨了温度和热定型时间对取向结构，机械性能和干缩率的影响。发现拉伸强度随延长的储存时间而增加。 70°C的纤维热定型可提供最佳的取向度和机械性能。 80°C的纤维热定型40分钟可获得最低的干收缩率。伸长率为50％的纤维的弹性回复率为83.42％。

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