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Moisture-mediated intrinsic self-healing of modified polyurethane urea polymers

Supporting Information
 
: Wittmer, Anastassija; Brinkmann, Andreas; Stenzel, Volkmar; Hartwig, Andreas; Koschek, Katharina

:

Journal of polymer science. A, polymer chemistry 56 (2018), No.5, pp.537-548
ISSN: 0360-6376
ISSN: 0887-624X
ISSN: 1099-0518
ISSN: 1096-990X
English
Journal Article
Fraunhofer IFAM ()

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 thermomechanical behavior in dependence of the water uptake of the samples. FT‐IR analysis revealed that water is able to act as a plasticizer interrupting hydrogen bonding interactions within the polymer network and thus, influencing glass transition temperature and hardness of the samples.

: http://publica.fraunhofer.de/documents/N-515482.html