丙烯腈共聚物中加入少量醋酸乙烯共聚物进行湿法纺丝,可制得内部含有大量微孔、吸水性能很好的共混纤维。从高聚物溶解度参数出发,应用Scott方程,对共混物相容性及相分离状态进行了预测,并用动态粘弹仪测定了共混纤维的相分离状态,发现实验结果与分析预测完全一致。在此基础上,进一步研究了共混纤维相容性与吸水性能的关系。 Acrylonitrile copolymer by adding a small amount of vinyl acetate copolymer for wet spinning can be made containing a large number of micropores inside, good water absorption of the blended fibers. Based on the solubility parameter of polymer, the Scott equation was used to predict the compatibility and phase separation of the blends. The phase separation of the blends was determined by dynamic viscoelasticity. The experimental results were in good agreement with the analysis and prediction . On this basis, the relationship between the compatibility of the blended fibers and the water absorption properties was further studied.