Reverse atom transfer radical polymerization (RATRP) for anti-clotting PU-LaCl3-g-P(MPC) films

► A facile and efficient approach for surface modification of PU was introduced. ► MPC was grafted onto the surface of PU film by RATRP. ► Some free La3+ ions reacted with CPTM and the product served as mixed ligand complex. ► The obtained PUs had good blood compatibility and a possible usage in biomedicine.