POS2-1039
Stress-Dissipative, Self-Healing Polyurethane Network Crosslinked by Tri-Disulfide Junctions for Transparent Optical Coatings.
Topic
S2. High-End Characterization/Polymer Physics/Properties
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
Seongho Hong (UNIST)
Co-Author(s)
Abstract
Optical coatings are extensively used in next-generation devices, but traditional coating materials exhibit limited durability and are vulnereable to damage from environmental factors. Incorporating self-healing polymers can markedly improve operation life time and functional stability. However, conventional self-healingpolymers generally rely on non-crosslinked chain structures, which lead to relative weak mechanical properrties and restrict dynamic exchange to chain ends or side groups.
To adress these challenges, we developed a trifunctional disulfide crosslinker (Tri-HEDS) featuring three disulfide linkages in a single molecule. This molecular architecture generates multifunctional network nodes that themselves function as active bond-exchange sites, promoting effective and homogeneous damage recovery throughout the network. This three-dimensional network reinforces mechanical robustness while maintaining segmantal dynamics.
In this investigation, the Tri-HEDS containing self-healing polyurethane network showed a Young’s modulus approximately tenfold higher than that of a linear polyurethane (PU) reference. It provided more than 90 % scratch recovery after 2 h upon heating at 60 ℃, maintaning high self-healing performance. In addtion, this three-dimensional network structure surpressed ordered chain assembly of polymer backbones, leading to a low-crystallinity morphology, which contributed to high optical clarity. This disulfide exchange self-healing polymer fullfills the fundamental criteria for advanced optical systems, represening mechanically robust and optically transparent platform for next-generation self-healable optical materials.
To adress these challenges, we developed a trifunctional disulfide crosslinker (Tri-HEDS) featuring three disulfide linkages in a single molecule. This molecular architecture generates multifunctional network nodes that themselves function as active bond-exchange sites, promoting effective and homogeneous damage recovery throughout the network. This three-dimensional network reinforces mechanical robustness while maintaining segmantal dynamics.
In this investigation, the Tri-HEDS containing self-healing polyurethane network showed a Young’s modulus approximately tenfold higher than that of a linear polyurethane (PU) reference. It provided more than 90 % scratch recovery after 2 h upon heating at 60 ℃, maintaning high self-healing performance. In addtion, this three-dimensional network structure surpressed ordered chain assembly of polymer backbones, leading to a low-crystallinity morphology, which contributed to high optical clarity. This disulfide exchange self-healing polymer fullfills the fundamental criteria for advanced optical systems, represening mechanically robust and optically transparent platform for next-generation self-healable optical materials.
