期刊
POLYMERS
卷 13, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/polym13121935
关键词
polyurethanes; Diels-Alder reaction; crosslinked polyurethanes; recyclability
资金
- Russian Science Foundation [21-73-20117]
- Russian Science Foundation [21-73-20117] Funding Source: Russian Science Foundation
A series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels-Alder reaction showed strong dependency of Young modulus on BMI content, allowing for materials with varying elasticity. The DA and retro-DA reactions between furan and maleimide were investigated by various analytical techniques, demonstrating high strengths and recyclability in at least five reprocessing cycles.
We prepared a series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels-Alder reaction based on TDI end-caped branched Voranol 3138 terminated with difurfurylamine and 4,4 '-bis(maleimido)diphenylmethane (BMI). We showed that Young modulus strongly depends on BMI content (from 8 to 250 MPa) that allows us to obtain materials of different elasticity as simple as varying BMI content. The ability of DA and retro-DA reactions between furan and maleimide to reversibly bind material components was investigated by NMR spectroscopy, differential scanning calorimetry, and recycle testing. All polymers obtained demonstrated high strengths and could be recovering without significant loss in mechanical properties for at least five reprocessing cycles.
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