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Sunday, 15 September 2019
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Raw materials & technologies, Technologies, UV/EB Coatings

Influence of hydrogen bonding interactions on the properties of UV coatings

Friday, 20 November 2015

Phenolic novolac type epoxy resin has been modified with acrylic acid (AA) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) to form ultraviolet-curable coatings, and integrated performances of the coatings were evaluated.

Researchers modified phenolic novolac type epoxy resin to form ultraviolet-curable coatings. Source: Maren Beßler/pixelio.de

Researchers modified phenolic novolac type epoxy resin to form ultraviolet-curable coatings. Source: Maren Beßler/pixelio.de

It was found that the hydrogen bonding interactions among the oligomers became stronger along with the increase of AMPS content, thus the oligomer viscosity and a variety of polymer properties were affected.

AMPS-modified coatings could be removed

The polar hydrogen bond donors significantly enhanced the adhesion strength and surface wetting behaviour of the coatings. Meanwhile, hydrogen bonding interactions can also reinforce the three-dimensional structure of the film as in polymeric state, which potentially increased its glass transition temperature and mechanical properties. Results of chemical resistance showed that coatings modified with moderate amount of AMPS could be completely removed in several minutes when exposed to alkali solution or anhydrous ethanol. With these attractive features, modified films had prospective applications in temporary protective coatings.

The study is published in: Journal of Applied Polymer Science.

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