‘‘loss of acrylate unsaturation is only one of a number of mechanisms which lead
to the development of a properly cured coating film.’’
While the FTIR cure speed measurement method related more to the inherent
chemical crosslinking taking place on UV exposure, the development of real-
time DMA resulted in a more time-efficient means to evaluate the property
development of a coating.
Coating cure is dependent on the peak intensity, emission spectrum, tempera-
ture, and geometry of the lamps to which it is exposed. It is also dependent on the
coating’s absorption of incident UV radiation. It has not been possible to exactly
measure the environment encountered by the coating as it is exposed to UV
energy on the draw tower. However, it is possible to