Surface modification of polyurethane(PU) by appropriate treatment and introducing silane coupling agent to PU surface was used to improve the adhesion of PU to silicone rubber (SR).FTIR and X-ray energy spectrometer were employed to investigate the surface treatment and graft reaction of silane coupling agent

while surface morphology and properties of materials were characterized by scanning electron microscopy and water contact angle.Different PU/SR interfaces after oscillation and shear were compared as well.The results indicated that the hydrophilicity of PU was improved after surface treatment

which generated more hydroxyl groups that could react with isocyanate-terminated silane coupling agent.When condensed room temperature vulcanized SR was poured onto PU surface

the silane coupling agent on PU surface could condense with it to improve the adhesion of PU and SR by connecting them with chemical bonds.