交联改性阴离子聚氨酯水分散体的制备与性能研究  

Study on preparation and properties of crosslinked anionic waterborne polyurethane

作　　者：岳杰[1] 沈一丁[1] 赖小娟[1] 钟新荣 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]川庆钻探工程有限公司长庆井下技术作业公司,陕西西安710021

出　　处：《功能材料》2011年第10期1795-1798,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50973057;51103081);陕西省教育厅专项基金资助项目(06JK333)

摘　　要：由甲苯二异氰酸酯(TDI)、聚己内酯二醇(PCL)和二羟甲基丙酸(DMPA)反应,再与高醚化度甲醇醚化三聚氰胺甲醛树脂(HMMM)反应,制备了一种交联型阴离子水性聚氨酯。采用红外光谱对样品进行表征,并讨论了交联改性对聚氨酯乳液粒径分布、胶膜耐水性、力学性能、热稳定性及结晶度的影响。红外分析证实HMMM与聚氨酯发生了交联反应。当m(HMMM)∶m(—COOH)=2.25时,胶膜拉伸强度达到30.3MPa,吸水率为17.2%,吸乙醇率为10.9%,与水接触角为69.6°,Tmax(最快分解温度)为301.5℃,结晶度为1.10%。A new crosslinked aqueous anionic polyurethane was prepared by toluene diisocyanate（TDI）,polycaprolactone（PCL）,dimethnololpropionic acid（DMPA） and neutralized by triethylamine（TEA）.Then the aqueous polyurethane reacted with hexamethoxymethyl melamine（HMMM） as a cross-linking agent.The product was characterized by FT-IR.And particle size distribution of waterborne polyurethane was researched,the water resistance,mechanical properties,thermal stability and crystallinity of the film were also tested.The FT-IR spectrum indicated that HMMM was crosslinked with polyurethane,and when m（HMMM）∶m（—COOH）=2.25,tensile strength is up to 30.3MPa,water absorption rate and ethanol absorption rate decreased to 17.2% and 10.9%,contact of angle increased to 69.6°,Tmax is 301.5℃,crystallinity decreased from 3.77% to 1.10%.

关 键 词：阴离子 聚氨酯 HMMM 胶膜性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]