Synthesis and Properties of Waterborne Polyurethane Modified with Organic Silicon
Abstract: In this paper, a series of waterborne polyurethane (WPU) were prepared by reaction of diisocyanate, polyether polyols, 2,2 - dimethylol propionic acid and organic Silicon through prepoling, chain-extending, modifing with Organic Silicone. The structure of the emulsion was characterized with infrared spectra. Impact on emulsion surface tension of the Organic Silicon consumption; the emulsion stability for different isocyanate, polyether polyols; hydrophilic amount on appearance, viscosity , stability and mechanical properties after becoming membrane; and the chain extender, the initiator of the mechanical properties of membranes impact were discussed. The results showed that, suitable cross linker and chain extender used in the emulsion system which membraned under certain temperature made the mechanical properties greatly improved, Organic Silicon material modified also improve a lot to polyurethane mechanics performance of membrane.
Keywords:Organic Silicon; Modify; Waterborne Polyurethane; Emulsion; Mechanical Properties