2017
DOI: 10.1002/pola.28925
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Moisture‐mediated intrinsic self‐healing of modified polyurethane urea polymers

Abstract: Functional materials having the ability to self‐heal cracks or scratches after damage are of great interest for a huge scope of applications. Herein, we report a self‐healing polyurethane urea‐based material with implemented 1‐(2‐aminoethyl) imidazolidone (UDETA) as a chain terminating molecule and for hydrogen bond network formation. Both, UDETA content and moisture affected the self‐healing process. The reversible change in the materials properties was proven by detailed analyses of hardness and thermomechan… Show more

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Cited by 23 publications
(12 citation statements)
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“…Such an effect is similar to reported moisture mediated selfhealing. [36,37] Swelling tests of UPy-CPU-2 in various solvents (Figure S19, Supporting Information) highlight that this effect is dominant for chloroform with the highest swelling ratio. In addition, acetone and IPA displayed a second effect; that is to trigger the dynamics of hydrogen bonds.…”
Section: Mechanical and Self-healing Propertiesmentioning
confidence: 99%
“…Such an effect is similar to reported moisture mediated selfhealing. [36,37] Swelling tests of UPy-CPU-2 in various solvents (Figure S19, Supporting Information) highlight that this effect is dominant for chloroform with the highest swelling ratio. In addition, acetone and IPA displayed a second effect; that is to trigger the dynamics of hydrogen bonds.…”
Section: Mechanical and Self-healing Propertiesmentioning
confidence: 99%
“…The relative humidity was fixed to 15% to exclude the potential effect of moisture on the healing results. 19 Three samples of each polymer composition were tested in the pristine state and three more samples in the healed state for reproducibility. To study the effect of the healing temperature and time on the undamaged polymer properties and discard major contributions of aging phenomena on healing, the pristine samples were subjected to the same above-mentioned thermal treatment as the healed ones in an annealing step ( T ann = T SH ).…”
Section: Experimental Sectionmentioning
confidence: 99%
“…To our knowledge, this is the first report of moisture-healing property of NIPU-based coatings. Intrinsic moisture-healing properties of polyelectrolytes, , boronic-ester polymers, , and some polyurethane-polyureas , were only very recently reported. Moisture-healing property of these NIPU-based coatings was due to the presence of different polar groups, especially −OH groups in its structure.…”
mentioning
confidence: 99%