With varied proportions of lactic acid/adipic acid in the structure of polyester diol,the effects on the size of particle,hydrophilicity,biodegradability of polyurethane emulsion were studied.

• 结果表明:随着乳酸含量的增加,乳液的平均粒径出现一极小值;当乳酸含量为25%25时,由聚氨酯乳液得到的胶膜的亲水性最好;随着乳酸含量的增加,水性聚氨酯的可生物降解性能呈增大趋势。