Smart orbit atr

The analysis of material samples (flat shapes) was performed using a Nicolet FTIR 6700 spectrometer (Thermo Fisher Scientific, Waltham, MA USA) equipped with a Smart Orbit™ ATR attachment with a diamond crystal. The spectra were recorded in the range of 4000–450 cm⁻¹ with a resolution of 4 cm⁻¹, making 64 scans. OMNIC™ Series Software (Thermo Fisher Scientific, Waltham, MA, USA) was used for spectra analysis. For each fitting, 4 measurements (two on each side) were made to determine the homogeneity of the material.

The measurements were carried out using a Thermo Scientific Nicolet 6700 FT-IR spectrometer (Thermo Fisher Scientific, Waltham, MA, USA) equipped with a diamond accessory, Smart Orbit ATR, for analyzing samples in the wave number range from 4000–400 cm⁻¹. Samples were placed at the output of infrared beams. As the result of the study, oscillatory spectra were obtained, the analysis of which allows determination of the functional groups with which the radiation interacted.
For each of the analyzed samples, based on the FT-IR spectrum, a carbonyl index (CI) was calculated, according to Equation (4): $CI=\frac{I_{C=O}}{I_{C-H}}$
where:
$I_{C=O}$ —the intensity of the peak corresponding to the carbonyl groups C = O [-],
$I_{C-H}$ —the intensity of the peak corresponding to the aliphatic carbon chains [-].
Carbonyl index (CI) is a measure of the number of carbonyl groups in the tested samples generated during composting.

The infrared spectra of the MVQ vulcanisates were developed with Thermo Scientific Nicolet 6700 FT-IR spectrometer equipped with Smart Orbit ATR (Waltkam, MA, USA) diamond attachment, using the attenuated total reflectance (ATR) method. The spectra were made for the wavenumber range of 3500–500 cm⁻¹. Smooth and geometrised MVQ vulcanisates cleaned with acetone before and after laser modification were used in the test. Before the spectra of samples were made, background measurement had been carried out, each time including 64 scans. Identification of the absorbance bandwidth intensities helped determine the characteristic functional groups present in the tested structures of vulcanisates.