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Monday, 23 September 2019
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Raw materials & technologies, Technologies, UV/EB Coatings

Synthesis and properties of UV-curable self-healing oligomer

Tuesday, 15 November 2016

A novel UV-curable self-healing oligomer was designed on the basis of a quadrupolar hydrogen bond system.

Synthesis and properties of UV-curable self-healing oligomer. Source: Rike/pixelio.de

Synthesis and properties of UV-curable self-healing oligomer. Source: Rike/pixelio.de

The oligomer is formed by reacting a mixture of a hydrogen bonding group and a photosensitive monomer with three-arm polyols. The structure was identified using 1H NMR and the real-time FTIR was used to observe the conversion of double bonds.

Beneficial to the healing capacity

The self-healing property was monitored by optical microscopy and atomic force microscope, and the gloss induced by damaging and healing processes was tested using a glossmeter. Furthermore, a thermogravimetric analyser was used to test the thermostability. The healing performance was considerably improved with the increasing content of the ureido-pyrimidone dimer. The results revealed that the reversibility of the quadrupolar hydrogen bond system is beneficial to the healing capacity. The healing efficiency of UV-curable self-healing coatings can exceed 90% with the coating thickness of 110 μm.

The study is published in: Progress in Organic Coatings, Volume 101, December 2016, Pages 122–129

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