The used chain extender N,N-bis(2-hydroxypropyl) aniline was separated from polyurethane materials by dissolution,reduction,solvent extraction and column chromatographic analysis.

• 采用溶解、还原、溶剂萃取和柱层析从聚氨酯材料中分离出所用扩链剂N,N二(2羟丙基)苯胺。