INS11-1560
Harnessing advanced methods for the synthesis of oligosiloxane-based covalent adaptable networks
Topic
S11. PMSE–PSK50 Anniversary Symposium: Advancing Polymer Science for a Sustainable and Intelligent Future
When and Where
Nov 30, -0001
00:00 - 00:00
Room 110
Presenter(s)
Luke Baldwin (Air Force Research Laboratory - USA)
Co-Author(s)
Abstract
Covalent adaptable networks (CANs) are key to next-generation materials with enhanced reprocessability and repairability. This work explores the synthetic chemistry of oligosiloxane-based epoxy-thiol CANs to develop self-healing elastomers, focusing on how various oligosiloxane side chains influence thermomechanical properties. A range of elastomers was created, from near-supersoft (elastic modulus < 250 kPa) to highly stretchable (>180% strain). The dynamic covalent bonds, facilitated by an amine catalyst, enable fast stress-relaxation and excellent mechanical recovery upon reprocessing. Efforts toward a bio-based hardener for accessing supersoft networks will also be presented. These studies integrate synergistic siloxanes and esters into CANs to define the atomic-level characteristics that control macroscopic network properties. Furthermore, methods such as digital chemistry, automation, flow chemistry, and Bayesian optimization will be presented, which can be utilized to achieve additional optimization of methods and materials.
