In our investigation of the ring-opening metathesis polymerization (ROMP) of cyclopropenes (CPs), we developed a class of CPs that do not undergo homopropagation but selectively undergo alternating polymerization with low-strain cyclic olefins. This system produced polymers with controlled molecular weights, low dispersities, and regular microstructures, as evidenced by NMR spectroscopy and MALDI-TOF MS. We further developed the system to copolymerize CPs with dioxepins to produce polyacetals/ketals that degrade readily into small molecules under acidic conditions. The controlled nature also allowed for the synthesis of block copolymers and end group control.

Development and applications of living alternating ring-opening metathesis polymerization of cyclopropenes

253rd National Meeting (2017)

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