Abstract
Dynamic covalent networks (DCNs) have attracted great attention because of their capacity for reprocessing and remolding, based on macromolecular architecture transformations or rearrangements through dynamic exchange reactions. Here, a new dynamic exchange reaction between a phenol and an enol-one motif yielded from the phenol-yne click reaction is introduced, and the phenol-yne click reaction is facilely integrated into the fabrication of a novel DCN. To expand the scope of material recycling, another degradable DCN prepared using the same click reaction but with a degradable diacetal motif is introduced. After thermal fusion of these two DCNs and subsequent acidic hydrolysis, a porous polymer film with a porosity of 46% is afforded, which is verified to possess excellent oil absorption capacity and recyclability. The strategic design and fabrication of porous polymer films provide an entirely new pathway for the application of DCNs.
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