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Journal of Plastics Technology 2008/06

Cross-linking behavior of UV-curable acrylate resins

Within this study the effect of the concentrations of oligomer, reactive diluent and photoinitiator on the cross-linking characteristics of UV-curable urethane acrylate polymers was analyzed applying dielectric analysis (DEA), Attenuated Total Reflectance Spectroscopy (ATR spectroscopy) and Dynamic Mechanical Analysis (DMA). Real-time cure monitoring by DEA provided fundamental information on the progress of polymerization and polymerization rate. A significant effect of the ambient temperature on the curing characteristics was discernible. An influence of the concentrations of photoinitiator and reactive diluent on the curing rate and time was not observable. After a curing time of 230 seconds the various resin formulations exhibited degrees of cure between 0.96 and 0.99. ATR spectroscopy ascertained that the degree of conversion on the surface exposed to air during the curing process is enhanced by increased photoinitiator concentrations. DMA revealed glass transition temperatures between 16 and 21°C for the different materials.

Katharina Resch 1 | Gernot M. Wallner 2 | Reinhold W. Lang 12
1 Polymer Competence Center Leoben GmbH
2 Institute of Materials Science and Testing of Plastics, University of Leoben

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The Journal of Plastics Technology is a peer reviewed internet periodical published under the auspices of the Scientific Alliance of Polymer Technology (WAK)


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International Polymer Processing

International Polymer Processing, the journal of the Polymer Processing Society, is a discussion forum for the world-wide community of engineers and scientists in the field of polymer processing.

The journal covers research and industrial application in the very specific areas of designing polymer products, processes, processing machinery and equipment.


International Polymer Processing


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The Journal of Plastics Technology is indexed in SCOPUS, the largest abstract and citation database of peer-reviewed literature.