Material response to high shear impact is often complex with a combination of failure mechanisms and deformation modes resulting in damage that is unpredictable. Polymeric coatings have received attention for these applications due to their rate-dependent viscoelastic behavior, potential to incorporate self-healing properties, and ability to retrofit existing structures. While a significant amount of research has been devoted to understanding the behavior of traditional materials such as metals and ceramics under high-speed impact, the behavior of polymeric materials, particularly phase separated materials, is less understood. The goal of this project is to determine the influence of polymer architecture and morphology on high shear rate impact response in phase separated polyisobutylene (PIB)-polystyrene (PS) copolymers. Specifically, we have prepared linear block and graft copolymers and incorporated an anthracene-maleimide mechanophore at the soft segment/hard segment interface. Furthermore, we investigated the equilibrium morphologies after thermal and solvent annealing through AFM and SAXS.

Morphology of mechanophore containing phase separated polyisobutylene-polystyrene copolymers

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.