【摘要】 用氨化树脂进行湿法纺丝,采用接触角测量仪研究了通氨量对树脂亲水性的影响,借助光学显微镜、扫描电镜和压汞仪阐明了凝固浴温度、凝固浴中二甲亚砜的浓度和通氨量对初生丝条截面形貌和孔结构的影响。结果表明:随着树脂亲水性的增强和温度的升高,初生丝条的截面形貌趋向于圆形;树脂氨化后在湿纺初生丝条中生成的孔的总体积明显降低,且随着通氨量的增大在初生丝条中有一部分微米级大孔(6μm～100μm)转变为纳米级小孔(孔径<140nm),并且随着凝固浴温度和二甲亚砜浓度的升高初生丝条中大孔所占的体积百分数明显降低。更多还原

【Abstract】 An aminated PAN resin was spun by wet-spinning technology. The influence of amination degree on the hydrophilicity of the PAN resin was characterized by the contact angle method. The effect of coagulation temperature, dimethylsulfoxide concentration in the coagulation bath and aminating degree on cross-sectional morphologies of the nascent filament and void structure were investigated by optical microscopy, SEM and mercury porosimetry. Results show that the cross-section shape gets more and more circular with increasing of aminating degree and coagulation temperature. The total void volume decreases with the aminating degree. Some large voids with diameter ranging from ~6mm) to 100mm were transformed to small voids below 140nm when the aminating degree was enhanced. The proportion of large voids in the total void volume was decreased with increasing coagulation temperature and dimethylsulfoxide concentration.更多还原