Journal
ACS MACRO LETTERS
Volume 8, Issue 8, Pages 973-978Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.9b00439
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Funding
- National Natural Science Foundation of China [21734004, 21674038]
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Phthalic anhydride and propylene/ethylene oxide are copolymerized at room temperature by a bicomponent metal-free catalyst comprising a mild phosphazene base and triethylborane. Provided with proper loadings of the two catalytic components, block copolymers with strict (AB)(n)B-m type sequence structures and controlled molar mass (up to 60 kg mol(-1)) can be generated in one synthetic step, and the block architecture can be enriched by the use of mono-, di-, or tetrahydroxy initiators. The obtained polyester-polyether block copolymers readily undergo microphase-separation in bulk and nanoaggregation in selective (aqueous and alcoholic) solvents.
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