Overcoming oxygen inhibition in UV-curing of acrylate coatings by carbon dioxide inerting, Part I [Review]

摘要

The inhibitory effect of molecular oxygen in the photoinitiated polymerization of acrylate resins has been completely eliminated by operating in a carbon dioxide atmosphere. The high speed polymerization was followed in situ by real time infrared spectroscopy, thus allowing conversion versus time curves to be recorded for curing reactions occurring within a fraction of a second. The influence of the O-2 concentration and of the sample temperature on the polymerization kinetics has been quantified for a polyurethane-acrylate resin. Replacing air by CO2 proved to be particularly beneficial for polymerizations carried out under conditions where O-2 diffusion was enhanced, i.e. thin films of a highly fluid resin exposed to low intensity light at high temperatures. (C) 2003 Elsevier B.V. All rights reserved. [References: 20]