新型磺酸盐水性聚氨酯乳液的合成及其性能研究

以聚己二酸乙二醇酯二元醇、甲苯二异氰酸酯、乙二胺基己磺酸钠(N60)等为主要原料,制备了一系列不同N60用量的磺酸盐型水性聚氨酯(WPU)乳液。研究了N60用量对WPU乳液及其胶膜性能的影响,并通过FT-IR、TEM、TGA等方法进行表征。结果表明,磺酸盐型WPU乳液的贮存、冻融、高温稳定性均较好。随N60用量的增加,磺酸盐型WPU乳液粒径先减小后增大,粒径分布变窄,胶膜的拉伸强度、吸水率呈上升趋势、断裂伸长率下降。TEM图显示微粒分散性好,呈球形;相对于羧酸型WPU,磺酸盐型WPU胶膜的拉伸强度提高,热稳定性更好。

Study on Synthesis and Performance of Novel Sulphonate Waterborne Polyurethane Emulsion

A series of novel sulphonate type waterborne polyurethane （WPU） emulsion with different ethylenediamine sodium sulphonate （N60） content were prepared with poly （ethylene-glyeol-adipate） diols, toluene diisocyanate （TDI） and N60 as main raw materials. The effects of N60 content on the WPU emulsions and films performance were studied. The WPU emulsions and films were characterized by FTIR, TEM and TGA. The experiment results showed that the sulphonate type WPU emulsion had better storage stability, freeze thaw stability and high temperature stability. With the increasing of N60 content, the particle size of WPU emulsions was smaller first and then bigger, the dispersivity of particle size became narrower, the tensile strength of film and water absorption increased, the elongation at break decreased. The particles of WPU emulsion were basically spherical and its distribution were good. Compared with earboxylie acid type WPU, the film of sulphonate type WPU presented better tensile strength and thermostability.