Bottlebrush Midblocks Promote Colloidal Bridging of Telechelic Polymers
Document Type
Article
Date of Original Version
10-15-2024
Abstract
Telechelic polymers are effective rheological modifiers that bridge between associative constituents to form elastic networks. The performance of linear telechelic chains, however, is controlled by entropic forces and thus suffers from an upper limit on bridge formation. This work overcomes this limitation by utilizing telechelic triblock copolymers containing bottlebrush midblocks. By comparing the rheological properties of emulsions linked by telechelic bottlebrush polymers to those containing linear chains, we determined that telechelic polymers with bottlebrush midblocks form elastic networks more efficiently. These enhanced rheological properties arise from the high stiffness of the bottlebrush midblocks, which offsets the entropic stretching penalty for bridge formation, enabling them to more readily form networks. This molecular-level control over polymer conformation in complex fluids opens avenues for designing highly elastic networks with minimal polymeric additives.
Publication Title, e.g., Journal
ACS Macro Letters
Volume
13
Issue
10
Citation/Publisher Attribution
Keane, Daniel P., Timea Kolozsvary, Benjamin McDonald, and Ryan Poling-Skutvik. "Bottlebrush Midblocks Promote Colloidal Bridging of Telechelic Polymers." ACS Macro Letters 13, 10 (2024). doi: 10.1021/acsmacrolett.4c00428.