Curing rate curve was multimodally fitted by the peak separation method based on the consideration that free radical UV-curing process is generally caused by multiple active centers. A parameter of tV-inh

which is the intersection of abscissa and the tangent line of the inflection point of curing rate curve

is assigned to evaluate oxygen inhibition extent. The results showed a more oxygen-sensitive curing reaction could be isolated by overlapping peak resolving

and the relationship between tV-inh and initiator content x turned out to be fulfilled the algebraic expression of tV-inh=A/x+B optimally

and the value of (A+B) could be used to describe the oxygen inhibition trend for a given curing formula.