近年来对于在N、O、S原子上具有乙烯基的化合物十分重视,在N-乙烯基化合物中,对于N-乙烯基丁内酰胺更有特殊的兴趣。它的聚合体——聚乙烯基丁内酰胺具有非常好的亲水性,在水和有机溶剂中的溶解度比其他水溶性的聚合物都大,而且抗酸、抗热和对于盐的作用的稳定性都很大。是在医药工业中广泛应用的第 In recent years, attention has been paid to compounds having a vinyl group at the N, O, and S atoms. Among the N-vinyl compounds, N-vinylbutyrolactam is of more special interest. Its polymer, poly (vinyl butyrolactam), has very good hydrophilicity and solubility in water and organic solvents than other water-soluble polymers, and is resistant to acid, heat and salts Stability is great. It is widely used in the pharmaceutical industry