Details

Autor(en) / Beteiligte

• Van Damme, Jonas
• van den Berg, Otto
• Vlaminck, Laetitia
• Brancart, Joost
• Van Assche, Guy
• Du Prez, Filip

Titel

Anthracene-based polyurethane networks: Tunable thermal degradation, photochemical cure and stress-relaxation

Ist Teil von

• European polymer journal, 2018-08, Vol.105, p.412-420

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Synthesis of anthracene-based polyurethane networks with different dimers having variable thermal stability.•Establishing the structure-property relationship of the thermal scission behavior.•Recuring the thermally dissociated films and coatings.•Stress-relaxation in thin films by photo- and thermostimulated bond exchange. Anthracene dimer diols having very different thermal stabilities have been incorporated in polyurethane networks. The thermal de-crosslinking of these networks was shown to be dependent on the anthracene dimer used, allowing tunable thermal degradation. This scission was studied using (HR-MAS) NMR, DSC and rheometry. The tunable thermal decrosslinking was validated as a technique to easily remove the coatings at their end-of-life. The UV irradiation of the thermally degraded materials allows for recuring the coatings to materials having similar properties. By simultaneous irradiation and heating of (partially) reversibly cross-linked networks, the networks were able to relief internal stress and adopt a new permanent shape.