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以异佛尔酮二异氰酸酯(IPDI)、聚ε-己内酯二醇(PCL210)、2,2-二羟甲基丙酸(DMPA)、1,4-丁二醇(BDO)、三羟甲基丙烷(TMP)等为主要原材料,合成水性聚氨酯(WPU)乳液。试验主要探讨了嵌段物序列结构、亲水基、中和度及交联剂用量等因素对聚氨酯乳液及膜性能的影响,并进行了分析表征。结果表明:在该反应体系下,亲水基用量为聚合物总质量的0.90%～1.00%,中和度>90%,交联剂用量为聚合物总质量的1%～3%,能制备出含量较高(质量分数≥45%),且性能较好的水性聚氨酯乳液。
(IPDI), poly-ε-caprolactone diol (PCL210), 2,2-dimethylolpropionic acid (DMPA), 1,4-butanediol (BDO), trihydroxyl Methyl propane (TMP) as the main raw material, synthetic water-based polyurethane (WPU) emulsion. The effects of block structure, hydrophilic group, degree of neutralization and the amount of crosslinking agent on the properties of polyurethane emulsion and membrane were mainly discussed. The results showed that under this reaction system, the amount of hydrophilic groups was 0.90% ~ 1.00% of the total mass of the polymer, the degree of neutralization was> 90%, and the amount of crosslinking agent was 1% ~ 3% of the total mass of the polymer. A higher content (mass fraction ≥ 45%), and better performance of the water-based polyurethane emulsion.