Behavior of UV-cured print inks on LDPE and PBAT/TPS blend substrates during curing, postcuring, and accelerated degradation
Article first published online: 30 JUN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 22, November 15, 2014
How to Cite
2014), Behavior of UV-cured print inks on LDPE and PBAT/TPS blend substrates during curing, postcuring, and accelerated degradation. J. Appl. Polym. Sci., 131, 41116, doi: 10.1002/app.41116, , , and (
- Issue published online: 18 AUG 2014
- Article first published online: 30 JUN 2014
- Manuscript Accepted: 6 JUN 2014
- Manuscript Revised: 3 JUN 2014
- Manuscript Received: 23 JAN 2014
- Fundação de Amparo à Pesquisa do Estado de São Paulo—FAPESP . Grant Number: 2010/02631-0
- radical polymerization
During radiation curing, a reactive formulation is converted into a highly crosslinked coating film by means of polymerization reactions. This three-dimensional (3D) network is resistant to external degrading factors as it cannot be undone by any physical–chemical means. In this study, various ultraviolet (UV)-curable ink formulations with different pigments were developed. The behavior of the UV-curable inks was evaluated during UV curing in a photocalorimeter or in a UV tunnel. Inks were exposed to accelerated aging in an accelerated weathering chamber and their physical–chemical properties were investigated. The presence of residual fractions of unreacted species trapped in the 3D network formed during UV curing interferes with the degradation of the main structure during exposure in the weathering chamber. The ink formulations that did not easily absorb UV light increased in gloss and hardness, indicating that residual crosslinking is taking place at the same time that degradation is occurring. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41116.