Cheng Z, Zhang XY, Dai JB, Zhang HP (2005) Synthesis and surface property of siloxane-modified aqueous polyurethane. Chinese Journal of Chemical Physics 18(3), 448-452. [In Chinese]
Web link: Keywords:
siloxane-modify, aqueous polyurethane, surface property, polydimethylsiloxane, copolymers,
Abstract: A series of novel aqueous emulsion of siloxane-modified polyurethane (PU-(PE-PSI)) were synthesized based on poly ( propylene glycol) ( PPG ), polyether-grafted polysiloxane ( PE-PSI), 2,4-tolylene diisocyanate (TDI), dimethylol propionic acid ( DMPA ) and 1,4-butanediol ( BDO ) through a direct water emulsification of triethylamine (TEA). The aqueous emulsion was transparent and had a good stability. Fourier transform infrared spectroscopy ( FTIR) was used to identify the structure of PU-( PE-PSI ), indicating that the polysiloxane segment had been incorporated with polyurethane chain. Investigation of Electron Spectroscopy for Chemical Analysis ( ESCA ) and the water contact angle demonstrated that the siloxane migrated to the surface of film. The results also showed that PU-( PE-PSI ) was still a very good elastomer. With increasing the content of PE-PSI, the resistance to water improved and tensile strength increased, while the ultimate elongation decreased slightly for the PU-(PE-PSI) film.