Journal
NEW JOURNAL OF CHEMISTRY
Volume 38, Issue 2, Pages 770-776Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nj01245j
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Funding
- Huntsman Polyurethanes (China) Ltd.
- Shanghai Leading Academic Discipline Project [B202]
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Primary mono-amine (furfuryl amine) is functionalized as a chain extender to obtain linear polyurethane bearing pendant furan groups (L-PU-Furan), unlike the previous research (furanic diols as chain extender). Furfuryl amine can functionalize as a chain extender due to the reactivity between the resultant urea group and NCO group at higher temperatures. Pendant cross-linked polyurethane containing a DA bond (C-PU-DA) is obtained from the cross-linking of L-PU-Furan and a bismaleimide (BMI) via a Diels-Alder reaction. L-PU-Furan and C-PU-DA are characterized by H-1 NMR, FTIR, DSC and TGA. The results of H-1 NMR and gel-solution-gel experiments demonstrate that the C-PU-DA exhibits excellent thermal reversibility. C-PU-DA exhibits good healable properties as evidenced by the evolution of a crack versus temperature observed under polarizing optical microscopy. C-PU-DA exhibits good mechanical properties and healing efficiency, determined by breaking (tensile) strength measurements.
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