The test method is based on determining the absorption of infrared radiation by presenting the result as a spectrum. In Fourier spectrometers, the spectra are obtained by examining the absorption for the radiation beam from the entire tested IR range. After this beam has passed through the sample, the beam from the same source has not been interfered with, and the spectrum is obtained using the Fourier transform of the recorded interference spectrum. Thus, we obtain the absorption (or transmission) signal as a function of wavelength (wavenumber expressed in cm-1). The objective of the proposed testing procedure is to compare the spectrum before, during and after ageing process using the same test parameters.
The tests are conducted in accordance with own procedure using the FTIR spectrophotometer Jasco (FT / IR 6700) with ATR (Pro ONE View).
As part of the testing of the PM&VL7 research line, Rothoblaas membranes and tapes, Flex&Robust connections, injections and layers were examined before, during and after ageing.