the present invention describes a new crossslinkable and crosslinked aliphatic polyoxaesters and blends thereof that may be used to produce hydrogels , surgical devices such as sutures , sutures with attached needles , molded devices , and the like . the invention also contemplates a process for producing these polyesters . the crosslinked aliphatic polyoxaesters of the present invention are formed from an aliphatic polyoxaester a first divalent repeating unit of formula i : o -- c -- c -- o ---- o -- c -- c --! i and a second repeating unit selected from the group of formulas consisting of : -- o -- r . sub . 4 --!. sub . a , ii -- o -- r . sub . 5 -- c --!. sub . b , iii and !. sub . p -- o --). sub . l g xi and combinations thereof . these aliphatic polyoxaesters may be blended with other polymers which are preferably biocompatible .