Rheological studies play an important role in polymer processing including fiber spinning. In the current work, rheological behavior has been studied for polyacrylonitrile (PAN)/carbon nanotube (CNT) dispersions in dimethyl formamide (DMF), where CNT loading is as high as 15 wt% of the total solids (polymer + CNT). The presence of CNTs increased the elastic-like and shear thinning behavior of the dispersions. The terminal slope of the log G′ versus log G″ curve, which was used to characterize the homogeneity of solution or dispersion, is dependent on the CNT concentration but independent of temperature between 0 and 60 °C. PAN/CNT-10 (90 wt% PAN +10 wt% CNT) and PAN/CNT-15 were gel spun at different conditions, with small diameter capillary at high shear rate and large diameter capillary at relatively low shear rate. For PAN/CNT-10, fiber spinning with lower molecular weight polymer showed increased continuous jetting time when compared to spinning with higher molecular weight polymer. In addition, the rheological behavior of PAN/cellulose nanocrystal (CNC) dispersion with 20–60 wt% CNC was also compared to that of the PAN/CNT dispersions. PAN/CNC and PAN/CNT share similarities in both rheological behavior and fiber spinning at high filler loading.

流变学研究在包括纤维纺丝在内的聚合物加工中起着重要作用。在当前的工作中，已经研究了聚丙烯腈（PAN）/碳纳米管（CNT）在二甲基甲酰胺（DMF）中的流变行为，其中CNT含量高达总固体含量的15 wt％（聚合物+ CNT）。CNT的存在增加了分散体的类弹性和剪切稀化行为。log G '与log G的终端斜率''曲线用于表征溶液或分散体的均匀性，它取决于CNT的浓度，但与0至60°C之间的温度无关。PAN / CNT-10（90 wt％PAN +10 wt％CNT）和PAN / CNT-15在不同条件下凝胶纺丝，小直径毛细管在高剪切速率下，大直径毛细管在相对低剪切速率下。对于PAN / CNT-10，与低分子量聚合物纺丝相比，低分子量聚合物纺丝显示出更长的连续喷射时间。此外，还将PAN /纤维素纳米晶体（CNC）分散体（含20-60 wt％CNC）的流变行为与PAN / CNT分散体进行了比较。PAN / CNC和PAN / CNT在高填充量下在流变行为和纤维纺丝方面都具有相似之处。