Abstract:

This work focused on the synthesis of norbornene macromonomers with poly(ethylene glycol)(PEG) and the preparation of graft copolymer by ringopening metathesis polymerization (ROMP) of these macromonomers. The molecular weight and  polydispersity of graft copolymer were studied by gel permeation chromatography (GPC). It was found that the molecular weight of graft copolymer was between 10 000 and 44 000  with polydispersity between 1.11 and 1.22. Moreover, the polydispersity of the polymer became narrowed with the increase of ［M］/［I］.

Key words: poly(ethylene glycol)(PEG), graft copolymer, ringopening metathesis polymerization, molecular weight, molecular weight distribution