Abstract
A series of Diels-Alder reaction cross-linked thermosets with recyclability and healability were prepared from furan-containing aromatic polyamide and bismaleimides with different chemical structures. The structures of synthesized bismaleimides were confirmed by 1H nuclear magnetic resonance (1H-NMR) spectroscopy; their reversible cross-linking with the furanic polyamide was further detected by 1H-NMR technique and sol-gel transition behavior. The dynamic mechanical analysis and tensile test revealed the variable thermal and mechanical properties of thermosets cross-linked by different bismaleimides and with different molar ratios of maleimide group to furan group (Ima/fur). The tensile test also demonstrated that the better recyclability and solvent-assisted healability of thermosets cross-linked could be achieved by more flexible bismaleimides. This work is expected to provide valuable information for design of recyclable and healable high-performance thermosets with desired properties.
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This work was financially supported by the National Natural Science Foundation of China (No. 51473031), the Natural Science Foundation of Shanghai (No. 17ZR1401100), and the doctoral innovation foundation (No. CUSF-DH-D-2017037).
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Luo, KJ., Huang, LB., Wang, Y. et al. Tailoring the Properties of Diels-Alder Reaction Crosslinked High-performance Thermosets by Different Bismaleimides. Chin J Polym Sci 38, 268–277 (2020). https://doi.org/10.1007/s10118-019-2328-7
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DOI: https://doi.org/10.1007/s10118-019-2328-7