Diels-Alder-Chitosan based dissociative covalent adaptable networks

For the first time, Diels-Alder and retro reactions were evidenced by 1H NMR spectroscopy DSC on chitosan based systems. At first, preliminary studies led to structural identification better understanding of reaction. Then, 30,000 g/mol 150,000 modified furfuryl glycidyl ether with 20% substitution degree. The resulting products cross-linked bis trismaleimide crosslinkers produce films possessing interesting mechanical properties. Unprecedented for chitosan-based films, DMA measurement highlighted between 110 130 °C. Films showed hydrophobicity fat absorption. They also exhibited resistance in acidic media whereas crude dissolved.