阴离子与非离子相结合合成高固含量水性聚氨酯—PEG400与DMPA配比对性能的影响  

Synthesis of high solid content waterborne polyurethane via combination of anionic and nonionic monomers:Effect of the ratio of PEG400 and DMPA on the property

作　　者：侯立杰[1,2] 唐媛媛[3] 丁永涛[2] 李学武 单志华[1] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都610065 [2]烟台大学化学与化工学院,山东烟台264005 [3]四川大学高分子科学与工程学院,四川成都610065 [4]山东省皮革工业研究所,山东济南250021

出　　处：《中国皮革》2015年第15期10-14,共5页China Leather

基　　金：湖南皮革工程技术中心重大项目(09H0746);烟台大学青年基金(HY13Z08)所提供支持

摘　　要：采用聚乙二醇(PEG,Mn=400)与二羟甲基丙酸(DMPA)相结合,合成高固含量水性聚氨酯。探索PEG400与DMPA以不同配比对乳液分散性、稳定性、固含量以及聚氨酯成膜吸水率、热性能、拉伸性能的影响。结果表明:大约3%的PEG400可替代0.8%的DMPA合成稳定的聚氨酯乳液,同时乳液固含量从42%(仅使用DMPA)提高到55%(3%PEG400+1.6%DMPA)。在聚氨酯中植入PEG400使聚氨酯软段玻璃化转变温度、成膜结晶度下降。相对单纯采用DMPA为亲水单体合成水性聚氨酯,PEG400与DMPA相结合,可以使水性聚氨酯耐水性及力学性能显著提高。High solid content waterborne polyurethane dispersions （PUDs） were synthesized via to the combination of polyeth- ylene glycol（ PEG, Mn = 400） and dimethylolpropionic acid （DMPA）. The effects of the ratios of PEG400 and DMPA on the dis- persion, stability and solid contents of PUDs, as well as the water absorption, thermal and tensile properties of polyurethane film were analyzed. The results show that about 3% PEG400 can replace 0. 8% DMPA to svnthesize stable PUDs, while the solid content raises from 42% （using DMPA alone） to 55% （3% PEG400 ＋ 1.6% DMPA）. The glass transition temperature （Tgs） and crystallinity of soft segments are decreased after introducing PEG400 into polyurethane. Compared to using DMPA alone as hydro- philic monomer to synthesize PUDs, the combination of PEG400 and DMPA can significantly improve the water resistance and me- chanical properties of PUDs .

关 键 词：水性聚氨酯 高固含量 耐水性 阴离子非离子相结合 分散性 

分 类 号：O633.14[理学—高分子化学]