【摘要】 借助光学显微镜及图像处理软件研究了凝固浴质量分数、温度、喷丝头牵伸倍率对湿纺PAN初生纤维截面形状和皮芯结构的影响。实验结果表明,较高的凝固浴质量分数(70%)、较高的凝固浴温度能使双扩散比较充分,所得初生纤维截面形状规整趋于圆形,并且芯部致密无孔洞。此外,随着牵伸倍率的升高,皮层厚度降低,皮芯差异增加,牵伸倍率为负牵伸是制备皮芯差异较小初生纤维的手段之一。更多还原

【Abstract】 The effect of coagulation bath conditions,including bath concentration,bath temperature,jet stretch radio on the cross section and skin-core structure of PAN nascent fibers during wet-spinning is discussed using the optical microscope with image processing software.Results show that the more circular cross section and lesser different skin-core structure of nascent fibers are obtained owing to the more sufficient double-diffusion under the higher coagulation bath concentration(70wt%)and the higher bath temperature.Besides,minus jet stretch ratio is another method to get compact structure and circular nascent fibers.更多还原