文献类型：期刊文献

中文题名：氨乙基氨丙基聚二甲基硅氧烷改性水性聚酯型聚氨酯的研究

英文题名：Waterborne Polyurethane Based on Polyester Polyol Modified with Aminoethylaminopropyl Polydimethylsiloxane

作者：江琳[1];陈永林[1];胡春圃[1];吴树森[2]

机构：[1]华东理工大学材料科学与工程学院，上海200237;[2]华东理工大学化学与制药学院，上海200237

年份：2004

卷号：17

期号：4

起止页码：565

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;CSCD:【CSCD2011_2012】；

基金：上海市科委纳米专项基础研究项目资助(0212nm008)

语种：中文

中文关键词：水分散液;改性聚氨酯;氨丙基;聚酯型聚氨酯;乙基;聚二甲基硅氧烷;聚酯二元醇;接触角;侧链;二羟甲基丙酸

外文关键词：waterborne polyurethane;aminoethylaminopropyl polydimethylsiloxane; surface properties;water resistance; heat resistance

摘要：由聚酯二元醇、异佛尔酮二异氰酸酯和二羟甲基丙酸合成聚氨酯预聚体，以氨乙基氨丙基聚二甲基硅氧(AEAPS)为扩链剂，制备了AEAPS改性聚氨酯水分散液。与未改性的聚氨酯水分散液相比，AEAPS改性聚氨酯水分散液的粒径增大，但粒径分布和表面张力基本不变，说明疏水的聚二甲基硅氧烷侧链被包裹于分散颗粒的内部；此外，改性聚氨酯水分散液的冻融稳定性显著增强。AEAPS改性聚氨酯水分散液成膜后，吸水率明显下降，水在膜表面的接触角增加，400℃时热失重下降，具有良好的疏水性和耐热性。
A series of polyurethane (PU) aqueous dispersions modified with aminoethylaminopropyl polydimethylsiloxane( AEAPS) were prepared with prepolymer synthesized by polyester polyol, isophorone diisocyanate (IPDI), and dimethylol propionic acid (DMPA). Compared with unmodified PU aqueous dispersion, the particle size of AEAPS-modified PU aqueous dispersions is bigger, but the particle size distribution and surface tension are not changed significantly. From these results, it could be concluded that the hydrophobic polysiloxane graft should be wrapped in the dispersed particle. In addition, the free-thaw stability of AEAPS-modified PU aqueous dispersions is improved remarkably. The films prepared with the modified aqueous dispersions show much lower water absorption ratio, higher water contact angle, and lower weight loss at 400℃ than the unmodified PU film resulting from the enhanced hydrophobic properties and heat resistance.