Cleavable Additives for Deconstructable, Recyclable Polyurethane Thermosets.

ABSTRACT: Polyurethane (PU) thermosets, particularly those derived from aliphatic components, are challenging to chemically deconstruct due to their permanent cross-linking. Current approaches to impart deconstructability typically rely on complete substitution of network precursors with cleavable analogs, limiting practicality. Cleavable additives (CAs) offer a potentially simple and cost-effective alternative, yet their application has been largely confined to chain-growth networks and remains unexplored in end-linked systems such as PUs. Here, we present a generalizable reverse gel-point theory that predicts the minimum CA loading required for deconstruction of end-linked networks. We validate this framework experimentally through the incorporation of two classes of silyl ether-based CAsbifuncti

SUBMITTER: Ko K 

PROVIDER: S-EPMC12395304 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature