A New Sample Preparing Method for IR Analysis of Thermosetting Resins

A new sample preparing method is introduced for the IR analysis of some thermosetting resins in which the film sample is formed on a slice of potassium bromide from the condensed liquid of decomposed resins. Comparing with traditional halide method, the interference of inorganic fillers and low molecular compounds is eliminated. The IR spectrum obtained is so clear and informative that the accurate qualitative analysis is possible.