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The purpose of this work is to clarify the mechanism of the action of a pulsed magnetic field (PMF) and adsorbed water on the properties of wood. The need to study these impacts is due to their significant influence on physical and mechanical characteristics of wood. The objects of the study have been microtomic sections of pine and birch wood, the method of investigation has been infrared Fourier spectroscopy. An insignificant change in the IR spectrum of birch wood treated with UTI has been observed in the whole investigated frequency range, except for the band 2 3602 330 cm -1 , where there is a sharp increase in transmission, which is presumably due to the released carbon dioxide. The influence of heat treatment is considered: a short (10 seconds) heating of a sample of birch wood to a temperature of 420 K has led to an inversion of its IR spectrum in the 2 360-2 330 cm -1 range compared to the original sample. After processing the air-dry sample of pine wood for 40 days in saturated water vapor, absorption intensity has increased and absorption band has broadened substantially in the area of 3000-3800 cm -1 . In addition, absorption has increased significantly at 2120 cm -1 and 1540 cm -1 , and double maximum at a frequency of 2360-2330 cm -1 has disappeared. Wide but not very intense transmission maximum has been observed in the frequency range of about 4500 cm -1 . As the sample has been dried under room conditions, it was found that there was no regular change in the spectrum in the frequency range of 2360-2330 cm -1 . The behavior of these maxima has a number of features during other manipulations with wood, observed in our experiments.

INVESTIGATION OF THE INFLUENCE OF PULSE MAGNETIC FIELD AND ADSORBED WATER ON THE PROPERTIES OF WOOD BY THE METHOD OF INFRARED SPECTROSCOPY