I was “volunteered” for this UV+EB Technology column journey in 2019. This column (number 30) is close to the same number of years I have been involved with UV technology. I still learn every day and get excited about new applications, while not forgetting the basic building blocks of UV, measurement and process control. This column will focus on the “ABCs” of UV measurement … [Read more...] about ABCs of UV Measurement & Process Control: Letter A
Articles
Comparison of EB- and X-Ray-Initiated Polymerizations for Extending Radiation Curing Opportunities, Part 1
In this study, conversion as a function of dose was measured for a series of (meth)acrylates during electron beam (EB) and x-ray polymerization to characterize the impact of the irradiation mode. Monomer chemistry was shown to be a key variable in the comparison of the two technologies, providing guidance for application choices. Part 1 provides the Introduction, Experimental … [Read more...] about Comparison of EB- and X-Ray-Initiated Polymerizations for Extending Radiation Curing Opportunities, Part 1
Cationic UV Polymerization Kinetics
In the 1st Quarter, 2023 edition of “Professor’s Corner,” we discussed the reaction kinetics of free radical UV polymerization. 1 In this edition, we will discuss the kinetics of cationic UV polymerization. Both processes involve “chain-growth” polymerization, but they differ significantly in the raw materials used and the reaction conditions employed. Introduction Kinetics … [Read more...] about Cationic UV Polymerization Kinetics
Tunable Nanocrystals for Next-Generation Displays
By Liz Stevens, writer, UV+EB Technology The performance of modern optical devices – from extended reality headsets to organic light-emitting diode (OLED) displays and precision sensors – depends on the ability to precisely control how light behaves as it moves through layered materials. Refractive index, the measure of how much a material bends light, is a foundational … [Read more...] about Tunable Nanocrystals for Next-Generation Displays
Advances in Photopolymer Design
The UV additive manufacturing techniques discussed in this column have focused primarily on hardware approaches to additive manufacturing or the chemistry developed in combination with those approaches. 1 The current column is a brief survey of chemistries developed to function within the existing printer hardware landscape to explore novel areas of material performance. These … [Read more...] about Advances in Photopolymer Design