Abstract

Near infrared reflection spectroscopy was used for in-line monitoring of the conversion and the coating thickness of thin UV-cured coatings which have a typical thickness in the range of some micrometers only. Quantitative analysis of the spectral data was carried out by PLS-based multivariate calibration methods. In addition, univariate procedures were tested for some applications. The conversion, in particular its dependence on the applied irradiation dose, was followed in both acrylic coatings, which were cross-linked by free radical polymerisation and in epoxy / vinyl ether blends, which were cured according to a cationic reaction mechanism. The thickness of acrylate coatings was studied in a range between 5 μm and 100 μm. It was shown that quantitative data with high precision and time resolution can be also obtained in pilot scale investigations, even if the coating line is operated at high speed.

© 2008 IM Publications LLP

Optical characterization and applications of a dual-cure photopolymerizable system

Reyna A. Duarte-Quiroga, Sergio Calixto, and Daniel J. Lougnot
Appl. Opt. 42(8) 1417-1425 (2003)

Preparation and performance of ultraviolet curable silicone resins used for ultraviolet cured coating and ultraviolet-assisted 3D printing materials

Xiongfa Yang, Qiong Chen, Haoyuan Bao, Jiangling Liu, Yufei Wu, and Guoqiao Lai
OSA Continuum 1(2) 542-552 (2018)

Ultraviolet-cured polymer microlens arrays

Takashi Okamoto, Miwa Mori, Tamae Karasawa, Seiichiro Hayakawa, Iwao Seo, and Heihachi Sato
Appl. Opt. 38(14) 2991-2996 (1999)

Tunable, all-reflective spatial heterodyne spectrometer for broadband spectral line studies in the visible and near-ultraviolet

Olivia R. Dawson and Walter M. Harris
Appl. Opt. 48(21) 4227-4238 (2009)

Terahertz time-domain spectroscopy for monitoring the curing of dental composites

Michael Schwerdtfeger, Sina Lippert, Martin Koch, Andreas Berg, Stefan Katletz, and Karin Wiesauer
Biomed. Opt. Express 3(11) 2842-2850 (2012)