Core‐Shell Hyperbranched Polymers via Catalytic Ring‐Opening Metathesis Polymerization

Abstract This work explores the synthesis, characterization, and applications of hyperbranched polymers (HBP) using a divergent ring‐opening metathesis polymerization (ROMP) approach. An ABB′‐type hyperbranching monomer, formed by covalently linking a traditional ROMP monomer to a chain transfer agent, was diluted with a linear comonomer to produce branched polymers with controlled molar mass and dispersity. Dynamic light scattering (DLS) and X‐ray scattering confirmed their globular shape in solution. Additionally, we functionalized HBPs to create core‐shell materials capable of encapsulating organic dyes efficiently. The study also highlights their role in sustainable polymer design, demonstrating degradation under mild acidic conditions. Core‐shell particles synthesized via this approach enabled efficient capture and rapid, on‐demand release of guest molecules, emphasizing their potential in drug delivery and advanced materials science.