The starch-based fishing composite fibers were prepared by one-step reactive extrusion and melt spinning. The effects of starch contents on the microstructural, thermal, dynamic mechanical, and mechanical properties of starch-based composite fibers were studied. And the degradation behaviors in soil of the fibers were also investigated. The compatibility between starch and HDPE is improved significantly by grafting maleic anhydride (MA) using one-step reactive blending extrusion. As the starch content increased, the melting temperature and the crystallinity of the fibers gradually decreased due to fluffy internal structures. Dynamic mechanical analysis showed that the transition peak α in the high-temperature region was gradually weakened and narrowed with increasing starch content; moreover, a shoulder appeared on the low-temperature side of the α peak was assigned to the β-relaxation related to starch phase. In addition, the mechanical results showed the significant decrease in the breaking strength and increase in the elongation at break of the starch-based composite fibers as the starch content increased. After degradation in soil for 5 months, the surface of the composite fibers had been deteriorated, while flocculent layers were observed and a large number of microfibers appeared. And the weight loss rate of the starch-based composite fibers (5.2~34.8%) significantly increased with increasing starch content (50~90 wt%).

中文翻译：

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淀粉基钓鱼用复合纤维及其降解行为

通过一步反应挤出和熔融纺丝制备淀粉基捕鱼复合纤维。研究了淀粉含量对淀粉基复合纤维的微观结构，热力学，动态力学和力学性能的影响。并对纤维在土壤中的降解行为进行了研究。通过使用一步反应共混挤出接枝马来酸酐（MA），可以显着提高淀粉与HDPE之间的相容性。随着淀粉含量的增加，由于蓬松的内部结构，纤维的熔融温度和结晶度逐渐降低。动态力学分析表明，过渡峰α随着淀粉含量的增加，高温区域中的玉米逐渐减弱和缩小。此外，在α峰的低温侧出现的肩峰被归因于与淀粉相有关的β-松弛。另外，机械结果表明，随着淀粉含量的增加，淀粉基复合纤维的断裂强度显着降低，断裂伸长率显着提高。在土壤中降解5个月后，复合纤维的表面已经变质，同时观察到絮凝层，并且出现了大量的微纤维。随着淀粉含量（50〜90 wt％）的增加，淀粉基复合纤维的失重率（5.2〜34.8％）显着增加。