a polymer having the following structure : where m is 0 to 10000 and n is 0 to 10000 . the polymer may be used in a coating such as on a biomedical device . the polymer is an adhesion promotor for a drug delivery system wherein the polymer is coated onto a substrate such that it may be a reactive coating for uv crosslinking . the polymeric coating may also provide an interface for an implant and can be modified with a secondary polymer or polymer combination . the secondary polymer is capable of eluding drugs or encapsulating cells .