University Research
Photopolymerization Kinetics Of Uv-Curable Polyester Powder Coatings Containing Urethane Methacrylate Reactive Diluents
Academic department
School of Polymer Science and Polymer Engineering
Description
A series of small molecule urethane methacrylates were synthesized and used as reactive diluents for UV-curable polyester powder coatings. A UV-curable polyester oligomer was prepared and formulated with the reactive diluents and a photoinitiator package. Kinetics studies were carried out using photo-differential scanning calorimetry (photo-DSC). The influence that the reactive diluent concentration, UV-light intensity, temperature, and atmosphere had on the reaction kinetics was investigated. Crosslinked samples that were analyzed via DSC showed that the glass transition temperature correlated well with the extent of conversion. In general, lower curing temperatures (i.e., ≤ 80°C) significantly reduced the conversion and polymerization rate. However, the use of a mono-functional reactive diluent facilitated much higher conversions than the UV-curable polyester control, even at just 5 wt% loading level. These findings suggest that reactive diluents can be used to improve the low temperature cure capability of UV-curable polyester powder coatings.
Publisher name
Springer
Document Type
Article
Digital Object Identifier (DOI) Link
https://doi.org/10.1007/s11998-025-01079-7
Publication Date
5-9-2025
Publication Title
Journal of Coatings Technology and Research
Volume
22
Issue
5
First Page
1791
Last Page
1805
Recommended Citation
Soucek, Mark D.; Hammer, Theodore J.; and Pugh, Coleen, "Photopolymerization Kinetics Of Uv-Curable Polyester Powder Coatings Containing Urethane Methacrylate Reactive Diluents" (2025). University Research. 28.
https://ideaexchange.uakron.edu/university_research/28
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.