10 5 moles were combined in a stirred reactor at 180 u00b0 c and stirred at 40 rpm for 30 minutes polymerization grade l lactide 151 35 g 1 07 mole was added and the temperature was increased to 195 u00b0 c after 2 hours the polymer was discharged from the reactor and allowed to solidify the solid polymer was ground cryogenically and was then devolatilized under reduced pressure at 105 u00b0 c to remove residual monomer the resulting copolymer had an inherent viscosity of 1 49 dl g 0 5 g dl conc in chcl 3 the composition was found to be 68 3 mole percent l lactide by 1 h nmr a plaque to be used for test specimen preparation was formed according to example 3 the material was found to undergo ductile deformation through crazing when bent at room temperature polymerization grade tmc 33 2 g 0 325 mole deg 1 72 u00d7 10 2 g 1 62 u00d7 10 4 mole and t 9 catalyst 7 6 u00d7 10 3 g 1 87 u00d7 10 5 moles were combined in a stirred reactor at 180 u00b0 c and stirred at 40 rpm for 35 minutes polymerization grade dl lactide 186 8 g 1 296 mole was added and the temperature was increased to 195 u00b0 c after 3 hours and 40 minutes the polymer was discharged from the reactor and allowed to solidify the solid polymer was ground cryogenically and was then devolatilized under reduced pressure at 25 u00b0 c for 18 hours to remove.