Chain Topology Engineering in Amphiphilic Block Copolymers: Crosslinking-Induced Nanodomain Refinement for Ultrahigh Energy Density under Extreme Conditions.

ABSTRACT: The growing demand for high-performance capacitors in extreme environments drives the development of polymer dielectrics with high energy capability and thermal stability. Here, an amphiphilic block copolymer constructed via self-assembly-induced nanoscale microphase separation is presented, in which fluorinated polyimide (FPI) and flexible polyetheramine (PEA) segments form thermally entropy-driven domains. Density-of-state model reveals significant electronic heterogeneity of the resultant copolymer, in which FPI exhibits an energy gap of 3.49 eV while PEA demonstrates a wide gap of 7.31 eV, resulting in an interfacial offset of 5.28 eV that inherently restrains the migration of charge carriers. A trifunctional crosslinker with dual electron-withdrawing groups (─CF₃/─O─) is in

SUBMITTER: Zhai F 

PROVIDER: S-EPMC12622496 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature