Copolymers of tyrosine-based polycarbonate and poly(alkylene oxide)

Randomized block copolymers formula (I) wherein R SUB, 1 EN - CH = CH - O (- CH 2 -) J, WHERE J is zero or an integer between one and eight; R 2 is selected from hydrogen, alkyl and alkylaryl groups straight or branched chain up to 18 carbon atoms and derivatives or compounds biologically or pharmaceutically ASSETS covalently bonded to said copolymer; EACH R.sup.3 is independently an alkylene group of up to 4 carbon atoms; And it is an integer between about 5 and about 3000; YF MOLAR FRACTION IS THE PERCENTAGE OF alkylene oxide in the copolymer, which is situated in the range between about 1 and about 99%. ALSO DESCRIBED IMPLANTABLE MEDICAL DEVICES AND IMPLANTS FOR DRUG ADMINISTRATION CONTAINING RANDOM BLOCK COPOLYMERS, METHODS WITH DRUG ADMINISTRATION AND PREVENTION TRAINING adhesions between the damaged tissues USING RANDOM block copolymers. ALSO DESCRIBED RANDOM polyarylate block copolymers.