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Article | REF: AM3044 V1

UV curing

Author: Christian DECKER

Publication date: July 10, 2000 | Lire en français

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    4. Photoamorinated polymerization kinetics

    One of the common features of all photopolymerizable systems is the speed of the process, which takes place in a fraction of a second under intense illumination. It is generally difficult to follow these ultra-rapid reactions quantitatively with a view to determining the fundamental kinetic parameters: polymerization rate, kinetic chain length, propagation rate constants (k p ) and termination rate constants (k t ). Time-resolved infrared spectroscopy (RTIR) [18] is currently the only method that can continuously record the evolution of the conversion rate as a function of exposure time in a sub-second time scale. This makes it possible to study the influence of chemical factors (photoinitiator, monomer, additives) and physical factors...

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