Block copolymers composed of immiscible polymeric blocks self-assemble to a rich variety of ordered nanostructures that find applications in many technologically important realms. Among different types of block copolymers, linear-bottlebrush-linear (LBBL) triblock copolymers present an emerging platform for creating multifunctional nanostructures. However, little is known about the fundamental mechanism of their self-assembly. We synthesize a series of LBBL polymers with precisely controlled anisotropy of bottlebrush block and weight fraction of the linear block. Characterizing morphology and microphase separation of the self-assembled nanostructures, we find that the molecular anisotropy of bottlebrush is sufficient to drivee LBBL polymers self-assemble to long range ordered nanostructures with exceptionally large domain sizes inaccessible by existing copolymer systems. Our results suggest that the self-assembly of LBBL polymers is driven by their molecular architecture rather than detailed chemistry. Such understanding may enable discovery of polymeric nanostructures with unpreceded properties and multifunction.
APS March Meeting Abstracts
- Pub Date: