We report the zinc(II) alkoxide-mediated ring opening polymerization of α-methyl-β-pentyl-β-propiolactone. The polymerization proceeds to high conversion and in the absence of significant transesterification to yield polymers with narrow molecular weight distributions. Poly(α-methyl- β-pentyl-β-propiolactone), PMPP, is an amorphous, low glass transition material that forms immiscible blends with polylactide (PLA). PMPP-b-PLA diblock copolymers, for use as potential blend compatibilizers, were synthesized in a controlled manner by sequential monomer addition. Graphical Abstract
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This work was supported by the David and Lucile Packard Foundation and the Toyota Motor Corporation. The authors thank Professor William Tolman for generous access to his laboratories, Dr. Letitia Yao for assistance and helpful conversation regarding NMR experiments, Dr. Dana Reed for assistance with MALDI measurements, and Laurie Breyfogle for supplying ligand for LZnOEt synthesis.
- Polylactide block copolymers
- Ring opening polymerization
- Substituted β-lactones
- Synthetic polyhydroxyalkanoates