Preparation of fluorine-silicon complexly modified water-based polyurethane and research on its performance
ZUO Yi-jie1, LI Feng-yan1, YU Hong-jian2, ZHAO Tian-bo3
1. School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 2. Xi'an Modern Chemistry Research Institute, Xi'an 710065, China; 3. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
Abstract: A series of polymer emulsions are prepared by using polyadipate-1,4-butanediol glycol (PBA) and isophorone diisocyanate (IPDI) as monomers,perfluoroalkylethyl acrylate and vinyltriethoxysilane as modifiers,2,2-bismethylolpropionic acid as an emulsifier,and trimethylolpropane (TMP) as a diplomatic agent,through copolymerizing two monomers with two modifiers at different mass fractions and a fixed mass ratio of 1:1.The particle size,storage stability and viscosity of the emulsion are measured,and the water resistance,heat resistance,hardness,and chemical resistance of adhesive film,and the micro-morphology of the fracture facet and surface are characterized.Results show that the appearance and storage stability of the emulsion are good when the DMPA content is higher than 3.3%.The addition of TMP can improve significantly the hardness of the adhesive film,with the maximum hardness being 50.3 HA,while the addition of fluorine- and silicon-containing groups can increase obviously the water resistance and heat resistance.As total mass fraction of two modifiers is 9% and the mass ratio between them is 1:1,thermal decomposition temperature of the film is 20℃ higher than that of the film before modification,and the water absorption reaches 7.7%.
左一杰, 李凤艳, 蔚红建, 赵天波. 氟硅复合改性水性聚氨酯的制备及性能研究[J]. 现代化工, 2021, 41(1): 123-127.
ZUO Yi-jie, LI Feng-yan, YU Hong-jian, ZHAO Tian-bo. Preparation of fluorine-silicon complexly modified water-based polyurethane and research on its performance. Modern Chemical Industry, 2021, 41(1): 123-127.
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