Fluorinated Block Copolymer Resin for Phase-Separated Structures

The invention changes the chemical composition parameter by introducing a fluorinated block into the block copolymer structure. This compositional change modifies the interaction parameter χ between blocks, thereby improving phase-separation performance without relying solely on increasing molecular weight. The fluorinated block creates stronger repulsive interactions due to fluorine's unique properties, achieving better phase separation at moderate molecular weights.

The invention creates a composite block copolymer structure combining hydrocarbon blocks (polystyrene or polymethyl methacrylate) with a fluorinated block (poly(α-cyano-α,α,2,2,2-pentafluoroisobutyrate) or similar). This composite structure leverages the incompatibility between fluorinated and hydrocarbon segments to achieve enhanced phase separation, effectively resolving the contradiction between period size and phase-separation performance.

The invention modifies the chemical composition parameter by incorporating fluorinated monomers into the block copolymer structure. This compositional change enhances the interaction parameter χ between blocks, thereby improving phase-separation performance while maintaining a straightforward synthesis approach using established polymerization techniques.

The fluorinated block acts as an intermediary that introduces strong repulsive interactions between blocks. The fluorinated segment serves as a mediator that enhances phase separation by creating a distinct chemical interface, allowing the system to achieve superior phase-separation performance while building upon the foundation of conventional block copolymer synthesis methods.