Lee, Juho Park, Gyeongmin Lee, Dongju Shin, Jiyun Ahn, Cheol-Hee Lee, Jaejun Kim, Tae Ann 2024-10-04T01:30:30Z 2024-10-04T01:30:30Z 2024-10-02 2024-11 2051-6347 https://pubs.kist.re.kr/handle/201004/150712 Dynamic covalent networks serve as effective tools for dissipating high-strain rate mechanical energy throughout reversible bond exchange reactions. Despite their potential, a gap exists in understanding how polymer chain mobility and the kinetics of bond exchange reactions impact the energy dissipating capabilities of dynamic covalent networks. This study presents an optimal strategy to enhance energy dissipation by controlling the side chain structures and bond exchange rates of dynamic covalent networks. Lipoic acid-derived polymers are chosen as our model system due to their easily tunable side chains and disulfide-rich backbones. High-strain rate stress waves are subjected to the polymers using a laser-induced shock wave technique. A strong correlation is observed between the energy dissipation capability and the glass transition temperature of the poly(disulfide)s. Furthermore, the addition of a catalyst to accelerate the disulfide exchange reaction improves energy dissipation. Leveraging the inherent nature of cyclic disulfides, our polymers exhibit self-healing and chemical recycling to monomers. The principles observed in this study provide a rational framework for designing sustainable and efficient energy dissipating materials. An optimal strategy to enhance high-strain stress wave damping capabilities is proposed by using poly(disulfide)s with self-healing and chemical recycling capabilities. English Royal Society of Chemistry Principles for designing sustainable and high-strain rate stress wave dissipating materials Article 10.1039/d4mh00868e 1 Materials Horizons, v.11, no.21, pp.5220 - 5229 Materials Horizons 11 21 5220 5229 N scie scopus 001317792100001 Chemistry, Multidisciplinary Materials Science, Multidisciplinary Chemistry Materials Science Article GLASS TRANSITIONS DISULFIDE TEMPERATURE POLYMERS CRYSTALLIZATION BEHAVIOR PLATFORM