Certain embodiments of the invention provide a copolymer having a backbone, wherein the backbone comprises a) one or more units that comprise a group that will yield a biologically active agent upon hydrolysis of the backbone and b) one or more units of formula (II):wherein y is 1 or more. Other embodiments of the invention provide a therapeutic method for treating a wound in an animal comprising administering to an animal in need of such therapy, an effective amount of a copolymer as described herein.
