Research and application of high surface energy polyurethane resin
Long glass fiber reinforced polyurethane resins with high surface energy were prepared.The influence of the polymer polyol,crosslinking agent,auxiliary,etc.on the surface energy of polyurethane resin was investigated.The polyurethane resin with surface energy consistent with that of epoxy resin was synthesized.The glass fiber composite polyurethane resin was interfacially bonded with the epoxy resin to investigate the shear strength,tensile strength,fatigue resistance,etc.of the composite resin.The results showed that the polyurethane resin consistent with the surface energy of the epoxy resin could be synthesized by adjusting the formulation composition.The shear strength of the obtained composite resin was as high as 67.6 MPa,the tensile strength was 1 760 MPa,and the fatigue resistance test of 10 million times was achieved.
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