Keyword: «moisture»

The paper presents methods of evaluating the effectiveness of reactants to reduce the freezing of coal products. When choosing such a reactants, an important indicator is the dynamics of changes in their properties during freezing. It is shown that the reactants property not turning into solid (crystalline) state at temperatures -40 and -60 оС are more efficient in reducing the freezing of coals of different rank. It is noted that treatment of coals with such reactants leads to an increase in their total moisture content after freezing-thawing cycle as compared to the untreated coals.

This study presents the results of investigating the effect of moisture on the dielectric properties of epoxy materials. Measurements were carried out using gravimetric and dielcometric methods with an LCR meter at 12 kHz. A strong correlation was established between changes in dielectric permittivity and moisture content, confirming the applicability of the method for quantitative in situ moisture monitoring. Additionally, FTIR spectroscopy revealed signs of hydrolytic modification and plasticization of the epoxy network. The dielcometric method demonstrated high sensitivity to structural variations and proved to be a promising tool for diagnosing critical polymer components under operating conditions.