作　　者： ; ; ; ;

机构地区： 陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室

出　　处： 《精细化工》 2010年第12期1166-1170,共5页

摘　　要： 采用预聚体合成法,以二羟甲基丙酸(DMPA)和自制1,2-二羟基-3-丙磺酸钠(DHPA)为亲水扩链剂制备一系列含有磺酸基团的水性聚氨酯微乳液。利用FTIR对DHPA和聚氨酯的结构进行表征,证实了目标产物DHPA的生成,并作为亲水扩链剂引入PU链上。研究结果表明,随着DHPA含量增大,乳胶粒平均粒径从139.31 nm减小至57.75 nm,且粒径分布宽度变窄,胶膜的拉伸强度由43.0 MPa增加至55.7 MPa,断裂伸长率从361%增加至430%。TEM照片显示,乳液分散均匀,形貌规整,呈圆球状。乳液表观黏度随着剪切速率增加而下降,呈假塑性流体特征。 Waterborne polyurethane emulsions with sulfonic group were synthesized by a prepolymer process using dimethylol propionic acid（DMPA） and self-prepared sulfonic hydrophilic monomer（namely 1,2-dihydroxy-3-propanesulfonic acid natrium DHPA）.The structure of the film was confirmed by means of FTIR.The test results indicated that the DHPA has been synthesized and introduced into the chain of polyurethane.The results indicated that the particle size decreased from 139.31 nm to 57.75 nm,the particle distribution width became narrower,the tensile strength of the films increased from 43.0 MPa to 55.7 MPa and the elongation at the break of the films increased from 361% to 430% as the increase of the weight of DHPA.TEM photos showed that PU emulsions were well-dispersed with neat appearance.The viscosity of emulsions decreased,with the increase of shear rate,showing the pseudo-plastic characteristics.

关 键 词： 二羟基 丙磺酸钠 水性聚氨酯 制备 性能 功能材料

领　　域： [化学工程]