Abstract
The anionic block copolymerization of δ-valerolactone and L-lactide in the presence of potassium methoxide in THF at 20 o C yields «tailored» δ-valerolactone-L-lactide AB diblock copolymers exhibiting expected compositions and molecular weights. In the investigated process slight reacemization of L-lactide during polymerization occurs but transesterification and back-biting reactions do not take place. DSC measurements combined with optical microscopic observations indicate microphase separation of crystalline domains in these block copolymers
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