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김현우,윤영섬,양지원,차인환,송창식 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Due to environment issues, it is highly demanding to generate recyclable polymers and to use sustainable biomass-derived ingredients. In this work, we utilized 2,5-bis-hydroxymethylfuran (BHMF) as a starting material to produce thermoplastic and network polyurethanes (TPU and NPU) under facile, solvent-free (solid-state) ball-milling conditions. Interestingly, the urethanes bonds may undergo thermally-controlled trans-carbomoylation, a reversible dynamic covalent bond exchange. Because of this chemistry, we can demonstrate the self-healing, reprocessing, and shape memory properties from NPU films. We characterized topology freezing transition temperature (Tv), stress-relaxation behavior using dynamic mechanical analyzer (DMA) under different temperatures. This mechanochemical approach is facile, scalable, extensible to sustainable and recyclable polymers from other biomass-derived chemicals.
Changsik Song(송창식),차인환,김현우,윤영섬,양지원 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Due to environment issues, it is highly demanding to generate recyclable polymers and to use sustainable biomass-derived ingredients. In this work, we utilized 2,5-bis-hydroxymethylfuran (BHMF) as a starting material to produce thermoplastic and network polyurethanes (TPU and NPU) under facile, solvent-free (solid-state) ball-milling conditions. Interestingly, the urethanes bonds may undergo thermally-controlled trans-carbomoylation, a reversible dynamic covalent bond exchange. Because of this chemistry, we can demonstrate the self-healing, reprocessing, and shape memory properties from NPU films. We characterized topology freezing transition temperature (Tv), stress-relaxation behavior using dynamic mechanical analyzer (DMA) under different temperatures. This mechanochemical approach is facile, scalable, extensible to sustainable and recyclable polymers from other biomass-derived chemicals.