Hydrophilic Modification of Recycled-Polypropylene by Plasma

The maleic anhydride-grafted recycled-polypropylene was prepared by extrusion method and plasma technique,in order to introduce polar group on the surface of r-PP,improve the hydrophilic property and make it a better using to polypropylene fiber concrete(PPFC).FT-IR and static contact angle measurement of pure water on surface were used to investigate the hydrophilicity of the polypropylene surface and the relationship between the hydrophilicity and timeliness.The results indicated that through surface modification by plasma technique and reactive extrusion,the contact angle of r-PP could decrease to 58.9 degrees.Plasma could be further improved hydrophilic,the contact angle could decrease to 45.6 degrees.The hydrophilicity was still transitory.