Synthesis of perfectly alternating copolymers for polymers of intrinsic microporosity
Literature Information
Jian Zhang, Ralph Cooney, Qiang Fu, Greg G. Qiao, Sylvie Thomas, Tim C. Merkel
Copolymer's properties are controlled not only by co-monomers’ composition but also their sequence distribution along the chain. We hereby report a strategy to the synthesis of perfectly alternating PIMs copolymer, an important class of material for gas separation membrane. We achieve this copolymer microstructure through two-pot synthesis process via ABA trimer intermediate. For comparison, both alternating and statistical copolymers with same composition were prepared and characterized with 1H and 13C NMR, FT-IR, MALDI-ToF, GPC, TGA, DSC and WAXD. The present work offers new method for repeating unit sequence control in step growth polymerization system.
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