| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7105479 | Progress in Organic Coatings | 2018 | 9 Pages |
Abstract
Optimally designed coatings obtained up to 100% recovery within 10â¯min at 60â¯Â°C and partial recovery at room temperature. The self-healing properties of coatings were found to be linked to macro-organisation of polymer chains caused by interactions between hard segments and soft segments of the polyurethane moiety, leading to phase-mixing, promoted by bulky, non-symmetrical isophorone diisocyanate, or phase-separation, promoted by linear, symmetrical hexamethylene diisocyanate. The length of chain extender was found to have large influence on formulations prepared with hexamethylene diisocyanate, increasing phase-separation and haze with the increase of chain length. Diethylene glycol was found to improve phase-mixing and self-healing properties of hexamethylene diisocyanate based materials. The influence of chain extenders was found to be minimal for isophorone diisocyanate based materials.
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Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Adam W. Grzelak, Pascal Boinard, John J. Liggat,