Thermal degradation and isothermal crystallization behavior of curdlan propionate and its melt-spinning fiber
Thermal degradation and isothermal crystallization behavior of curdlan propionate and its melt-spinning fiber
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DOI：
10.1016/j.polymer.2021.123418
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发表时间：
2021-01-22
期刊：
影响因子：
4.6
通讯作者：
Iwata, Tadahisa
中科院分区：
文献类型：
--
作者：
Kabe, Taizo;Gan, Hongyi;Iwata, Tadahisa
研究了生物基塑料和β-1，3-葡聚糖衍生物柯德兰丙酸酯的热性能和结晶动力学。制备了熔融纺丝纤维，并对纤维形成机理和内部结构进行了分析。相对分子质量的下降曲线表明，柯德兰丙酸酯的热降解可能是通过随机断裂进行的。等温结晶过程的偏光显微镜显示，柯德兰丙酸酯形成球晶状形态，这在具有刚性主链的多糖中是不寻常的。通过对熔融纺丝条件的优化，发现在不使用增塑剂的情况下，可以纺制出具有良好可纺性的纺丝。等温结晶过程和熔融纺丝过程中，丙酸可得兰的结晶速率有显著差异。纤维的卷取速度、结晶度与拉伸强度呈正相关。根据广角X射线衍射结果和其他测量结果，提出了该纤维的高度有序结构模型。
The thermal properties and crystallization kinetics of Curdlan propionate, a type of bio-based plastic and beta-1,3-glucan derivative, were investigated. Melt-spun fibers were also prepared, and the fiber formation mechanism and internal structure were analyzed. The decrease curve in molecular weight suggests that the thermal degradation of Curdlan propionate likely proceeds by random scission. Polarized light microscopy of the isothermal crystallization process showed Curdlan propionate forms a spherulite-like morphology, which is unusual among polysaccharides with a rigid backbone chain. By optimizing the melt spinning conditions, it was found that it is possible to spin with good spinnability using a no plasticizer. The crystallization rate of Curdlan propionate was significantly different between the isothermal crystallization process and the melt spinning process. There was a positive correlation between the take-up speed, crystallinity, and the tensile strength of the fiber. A highly ordered structural model of the fiber was suggested from wide-angle x-ray diffraction results and other measurements.