It is observed that a mixed system of a solvent of the polyimide, such as NMP or DMA, and up to 50 volume%of a non-solvent, such as an ether derivative of glycol, can still dissolve the polyimide.

• 研究发现在聚酰亚胺的良溶剂NMP、DMA中可加入多至50%25体积的非溶剂乙二醇醚类,混合溶剂仍能溶解所研究的聚酰亚胺;