采用预聚体分散工艺,以不同工艺条件合成了一系列水性聚氨酯样品.用茚三酮作为显色剂使水性聚氨酯样品中的伯胺显色,采用可见光谱测定显色样品在560 nm处的特征吸收,定量分析水性聚氨酯样品的伯胺含量,从而研究不同工艺条件下的二胺扩链效率.
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