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Pentablock Copolymer from Tetracomponent Monomer Mixture Using a Switchable Dizinc Catalyst
- Chen, Thomas T. D., Zhu, Yunqing, Williams, Charlotte K.
- Macromolecules 2018 v.51 no.14 pp. 5346-5351
- anhydrides, carbon dioxide, catalysts, composite polymers, polymerization
- Well-defined pentablock copolymers are prepared using a single catalyst, in one pot, from four different monomers: anhydride, epoxide, lactone, and CO₂. The dizinc catalyst bridges three distinct polymerization cycles and performs a double switch in polymerization mechanism to produce pentablock copolymers. The new materials are hydroxyl-telechelic and are efficiently postfunctionalized to introduce polar and nonpolar side-chains.