A Series of photo-sensitive macromonomers FAnC(n=1～4) were synthesized by using caprolactone-modified acrylates

FAn and cinnamyl choride

and copolymers PMFAnC were synthesized by free radical copolymerization of FAnC with MAA in DMF using 2

2′-azobisisobutyronitrile as initiator．The structures of copolymers were characterized by using GPC

DSC

IR and 1H-MNR techniques．The copolymers form spherical micelles in aqueous solutions with PFAnC chains as the core

and PMAA chains as the corona．The stable nanospheres were prepared by photo-crosslinking of the cores of the micelles．These micelles were characterized by DLS and TEM．The results showed that PMFAnC could self-assemble into nanometer micelles with narrow size distribution

and the hydrodynamic radius Rh of the crosslinked micelles was smaller than that of the uncrosslinked ones．The critical aggregation concentratio of micelle formation and the Rh value both decreased with increase of the n value of the copolymers．