摘要
通过将由甲苯二异氰酸酯与聚四氢呋喃，二羟甲基丙酸反应制得的聚氨酯预聚体在低浓度氨基硅油的水乳液中扩链，合成了一种硅氧烷改性的聚氨酯水乳液，并用傅立叶红外光谱、ＥＳＣＡ 能谱、接触角仪、电子拉力试验机、吸水率测定及乳液稳定性测试对其进行研究。结果表明硅氧烷改性的聚氨酯水乳液稳定性好，硅氧烷在乳胶膜表面富集，对聚氨酯材料有明显的表面改性作用，材料耐水性提高，而本体的力学性质变化不大。
The polyurethane prepolymer which was based on 2,4-toluene diisocyanate (TDI), poly (tetramethylene oxide) (PTMO) and dimethylol propionic acid (DMPA) was extended in amino silicone emulsion to synthesize a kind of siloxane-modified waterborne polyurethane. The properties of the polyurethane were investigated using infrared spectroscopy (FTIR), electron spectroscopy for chemical analysis (ESCA), tensile and contact angle measurements, water absorption and emulsion stability test. It was shown that the PU emulsion was stable and the siloxane chains enriched on the PU surface. The water resistance of PU film increased and the bulk tensile properties of the PU film was not changed significantly with the siloxane-modification.
出处
《功能高分子学报》
CAS
CSCD
1999年第3期297-301,共5页
Journal of Functional Polymers
关键词
水性聚氨酯
氨基硅油乳液
改性
扩链
聚氨酯
waterborne polyurethane
amino silicone emulsion
surface modification
