

Introduction
Polymer materials have a molecular structure which is altered by mixing, heating, or irradiation with light. In some cases, those changes are completed in several seconds, while in others they proceed slowly over several hours. Because the Fourier transform infrared spectrophotometer (FTIR) enables high- speed measurement, FTIR is an extremely effective technique for tracking chemical reactions and changes that proceed very quickly. This article introduces the results of measurement of the reaction process of a UV-curable resin using the Rapid Scan function of IRXross, a new FTIR from Shimadzu Corporation