Controlled ring-opening polymerization ofL-lactide and 1,5-dioxepan-2-one forming a triblock copolymer

Resorbable and Highly Elastic Block Copolymers from 1,5-Dioxepan-2-one and l-Lactide with Controlled Tensile Properties and Hydrophilicity

“…The T m of the PLLA blocks is lower than the reported values, due to the rather low molecular weights of the PLLA blocks. The T m and T g values of the triblock copolymers were consistent with earlier reported values for similar triblocks . The multiblock copolymer had higher T g than the triblock copolymers.…”

Fibrillar structure of resorbable microblock copolymers based on 1,5‐dioxepan‐2‐one and ε‐caprolactone

“…The shortening of the block sequences of the copolymer of CL and DXO, compared with the earlier reported triblocks of LLA and DXO,1, 2 could, as already mentioned, be a result of the transesterifications reaction occuring during copolymerization. It can also be explained by the monomer reactivities; an earlier report on the copolymerization of CL and DXO with a stannous octoate catalyst in bulk at 110 °C gave the reactivities r CL = 0.6 and r DXO = 1.6,7 whereas the reactivity ratios, for the copolymerization of LLA and DXO under similar conditions were r LLA = 10 and r DXO = 0.1 8…”

Synthesis of Well‐Defined Dihydroxy Telechelics by (Co)polymerization of Morpholine‐2,5‐Diones Catalyzed by Sn(IV) Alkoxide

“…Efficiencies of the reactions were evaluated by determining the monomer conversions after appropriate time intervals ( Table 1 ). Sn(IV) alkoxide was successfully used for the ROP of l ‐lactide . Reported results presented a fairly good control of reaction and relatively high monomer conversion (>90%) when ROPs are carried out in homogeneous solutions at 60 °C.…”