【摘要】 为提高纤维的力学性能，采用后道拉伸处理聚丁二酸丁二醇酯(poly (butylene succinate),PBS)/丝胶蛋白(silk sericin, SS)共混纤维，研究拉伸倍数和拉伸温度对纤维形态结构、化学结构、热性能、力学性能与降解性能的影响。结果表明，随着拉伸倍数增加，PBS与丝胶蛋白发生相对位移，纤维表面沿拉伸方向出现明显条纹；随着拉伸温度增加，纤维表面的条纹减少，表明温度的增加提高了PBS分子链的运动能力，使纤维保持致密结构。随着拉伸倍数和拉伸温度的提高，共混纤维的力学性能和结晶度呈现先增加后减小的趋势，在后道拉伸倍数为4倍，拉伸温度为75℃时，纤维的结晶度可达61.30%,此条件下的纤维断裂强度最大为2.0 cN/dtex,接近粘胶纤维的力学强度，可满足纺纱、非织造等纺织加工工艺的要求。更多还原

【Abstract】 In order to improve the mechanical properties of the fiber, the poly(butylene succinate)(PBS)/silk sericin(SS) blend fibers were treated by drawing process. The effects of the drawing ratio and drawing temperature on the morphological structure, chemical structure, thermal properties, mechanical properties and degradation properties of the fibers were studied. The results showed that with the increase of the drawing ratio, the surface of the fibers showed obvious streaks along the stretching direction, indicating the relative displacement of PBS and silk sericin. With the increase of the drawing temperature, the streaks on the surface of the fibers decreased, indicating that the increase in temperature enhances the movement of PBS molecular chains, keeping the fibers in a dense structure. The mechanical properties and crystallinity of the blend fibers increased first and then decreased with the increase of the drawing ratio and drawing temperature. When the drawing ratio was 4 times and the drawing temperature was 75 ℃, the crystallinity of the fibers could reach 61.30%. Under this condition, the fiber breaking strength was 2.0 cN/dtex, which was close to the mechanical strength of viscose fibers and could meet the requirements of various textile processing methods such as spinning and non-wovens.更多还原