【摘要】 以异佛尔酮二异氰酸酯(IPDI)、聚四氢呋喃二醇(PTMG-2000)为主要原料,二羟甲基丙酸(DMPA)、赖氨酸(Lys)等作为小分子扩链剂,制备了含赖氨酸成分的水性聚氨酯(WPU)乳液。讨论了Lys用量对WPU乳液及胶膜性能的影响,并采用FT-IR、TGA等检测方法进行表征。结果表明:随着Lys用量的增大,WPU乳液的粒径增大,黏度也有所增加,稳定性变差; WPU胶膜的拉伸强度先增大后减小,断裂伸长率增大,静态接触角降低。更多还原

【Abstract】 Lysine-based waterborne polyurethane( Lys-WPU) emulsions were prepared with isophorone diisocyanate( IPDI) and polytetra methylene ether glycol( PTMG-2000) as the main raw material,dihydroxy methyl propionic acid( DMPA) and lysine( Lys) as chain extenders. The effects of Lys content on the properties of WPU emulsions and films were studied,and FT-IR and TGA test methods were used. The results showed that,with the increase of Lys content,the particle size of WPU emulsion increased,the viscosity also increased,and the stability became worse. The tensile strength of WPU film first increased and then decreased,the elongation at break increased,and the static contact angle decreased.更多还原