Siberian Federal University

The paper provides a comparative analysis of the indicators of water-soluble composite materials based on polyvinyl alcohol (PVA) of various degrees of hydrolysis during liquid-phase filling with polysaccharides (PS) of various nature and dispersion, some patterns were revealed: low-hydrolyzed PVA when filling with PS is not characterized by deformations of the shape and size of samples, unlike highly hydrolyzed PVA, for which due to the formation of areas of increased crystallinity has an effect of “compression” of the material during dehydration, correlating with the size of the filler particles; the light transmission of PVA filled with dextrin reaches the light transmission of pure PVA, regardless of the degree of its hydrolysis and filler content, for starch-filled composites, light transmission decreases with an increase in the degree of filling and an increase in the content of VA groups in PVA; the sorption capacity of composites in relation to water due to the peculiarities of the internal structure of the material is maximal when filled with dextrin and minimal when filled with microcellulose, regardless of the degree of hydrolysis of PVA; the ultimate strength of composites depends on the grade of PVA and the nature of the filler and decreases in the series “PVA‑dextrin” → “PVA‑starch” → “PVA‑microcellulose” → “PVA‑fiber of coffee beans”, for samples both in dry and moisture-saturated state, while the relative elongation of the material in dry the state is approximately the same for all experimental samples, but with moisture saturation there are strong intermolecular interactions in the “PVA – dextrin” and “PVA – starch” ensures the elasticity of the material, increasing its elongation by an order of magnitude compared to systems filled with coarse fiber particles