Results showed that with the improvement of the miscibility of PU and PVDF,the spinnability of the blend increased,but the pore formation property decreased.

• 拉伸使膜界面微孔张开,随拉伸倍数的增加膜通量先增加再略有下降后迅速增加,共混物晶区的规整性也有所提高;