摘要
以异氟尔酮二异氰酸酯(IPDI)、磺酸型聚酯二元醇(SPD205)、1,4-丁二醇(BDO)、丙烯酸羟乙酯(HEA)和乙二胺(EDA)为原料,制备了磺酸型水性聚氨酯(SWPU)。然后用丙烯酸丁酯(BA)和甲基丙烯酸甲酯(MMA)对SWPU改性,得到了不含有机溶剂的磺酸型水性聚氨酯-聚丙烯酸酯(SWPUA)。利用透射电镜、粒径分布仪对乳液的胶束形态、粒径进行了表征;利用X射线衍射仪、热重分析仪、拉力试验机对胶膜的结晶度、热稳定性、力学性能进行了分析。结果表明:制备的SWPUA为核壳结构,胶膜的结晶度为3.76%,耐热性比SWPU提高了22℃。当SPD205含量为40%、n(NCO)/n(OH)为1.7时,乳液稳定期达到12个月,平均粒径为44.17nm。
Waterborne polyurethane containing sulfonated segment（SWPU） was prepared with isophorone diisoeya- nate（IPDI） and sulfonated polyester-diol（SPD205） as main raw materials, then the sulfonated waterborne polyurethane- polyacrylate（SWPUA） emulsion was obtained by copolymerization with methylmethacrylate（MMA） and butylacrylate （BA）. The synthesis process was simple and easy to control without any organic solvent. The micellar conformation and di- ameter of emulsion were characterized by transmission electron microscopic（TEM） and diameter analyzer. The crystallini- ty,thermal stability, mechanical properties and water resistance of films were investigated by X-ray diffraction analysis （XRD）, thermogravimetric analysis （TG） and tension test. The results showed that the core-shell structure had formed be- tween polyurethane and polyacrylate, the degree of crystallinity of films was 3.76 %. After modificatng by polyacrylate, the thermal stability of SWPUA increased. When the SPD205 content was 40%, NCO/OH molar ratio was 1.7,SWPUA was obtained,the average particle size and storage stability of SWPUA emulsion were 44. 17nm and 12m.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第8期138-140,144,共4页
New Chemical Materials
基金
陕西省科技计划项目(2016GY-241)
西安市科技计划项目(CXY1527)
关键词
高固含量
磺酸盐
水性聚氨酯
聚丙烯酸酯
无三乙胺
high-solid-content, sulfonated segment, waterborne polyurethane, polyacrylate, amine^freeing
