A Novel Approach for Synthesis of Zwitterionic Polyurethane with Enhanced Self-healing Properties
발표자
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초록
내용
A new zwitterionic polyurethane (ZPU) is synthesized and its self-healing properties are characterized in this study. To synthesize ZPU, an acrylate-rich polyol and a styrene-rich polyol containing zwitterions are blended and the blended polyols are reacted with crosslinker containing multiple isocyanate groups. The resulting ZPU shows no phase separation and exhibits excellent optical properties like high total transmittance and low haze. A self-healing test performed in the presence of water reveals that ZPU shows more effective self-healing performances than conventional polyurethane with no zwitterions. This can be explained by the fact that the chain mobility of ZPU increases and the effective chain rearrangement occurs due to the interaction between water molecules and zwitterions, and the strong ionic interactions are reformed between ZPU chains in the healing process upon drying.