The aim of the study was to determine the mechanical properties of pine (Pinus sylvestris) sapwood, treated with aqueous solutions of ethanol and acetone. For this purpose, pine sapwood specimens were swollen in water, ethanol, acetone and aqueous solutions of ethanol and acetone. Static bending and compression strength along the grain and deflection in bending were determined. The results of the study show that a strong correlation exists between the strength properties and the swelling degree of pine sapwood. Pure substances and aqueous solutions influenced the mechanical properties of wood in different ways. Pine sapwood, treated with aqueous solutions of ethanol, has better elastic properties compared to wood, treated with other organic liquids used in this research.
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