Controlled polymerization has facilitated the design of macromolecular building blocks of various lengths, architectures, and compositions. For example, ring-opening metathesis polymerization (ROMP) relies on the opening of strained cyclic olefin monomers for the generation of linear, brush, or macrocyclic polymers. The exothermic nature of ROMP is also harnessed in frontal polymerizations to propagate local, cascading reactions that rapidly convert neat monomer into polymer materials. Although frontal ring-opening metathesis polymerization (FROMP) and ROMP share reaction mechanisms the conditions during polymerization differ greatly. Recently, we demonstrated the use of FROMP for controlled polymerization of linear polymers with living chain-ends even with polymerization temperatures over 170 degrees Celisus. Herein, we describe the use of controlled FROMP for the development of materials with varied macromolecular architectures (e.g., macrocyclic) with the future goal of additive manufacturing.

Controlled frontal ring-opening metathesis polymerization for varied macromolecular architectures

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