以异氟尔酮二异氰酸酯(IPDI)、六亚甲基二异氰酸酯(HDI)、聚己二酸-1,4-丁二醇酯(PBA)为主要原料,以1,4-丁二醇为小分子扩链剂,以乙二胺基乙磺酸钠为亲水性扩链剂,并用环氧树脂E-51作为改性剂,得到固含量为50％的环氧树脂改性磺酸盐型水性聚氨酯乳液SWPU -E.实验研究了环氧用量对乳液的粒径及其分布和对胶膜力学性能的影响；实验还采用红外、核磁、热重分析等方法对胶膜的结构和热稳定性等进行了深入的分析.结果表明:环氧树脂的羟基和环氧基团参与了反应,生成了环氧改性的水性聚氨酯结构；随着环氧用量的增加,乳液的平均粒径从95.8 nm增加到169 nm,粒径分布变宽；胶膜的拉伸强度随之变大,当环氧用量低于4％时,拉伸强度明显增加,由16.21 MPa增加到43.7 MPa,之后拉伸强度增加缓慢；胶膜的热稳定性随环氧用量的增加得到明显提高,初始分解温度、转折点温度、分解终点温度均朝高温方向移动.
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