Water Absorption of Wood-Polymer Composites Based on PVC with Partial Replacement of Wood Filler by Mineral One

The materials of wood-polymer composites (WPC) in the form of terrace boards, in which the wood filler is partially replaced by mineral one, are obtained. Materials from WPC with the use of matrix polymer (polyvinyl chloride) (PVC) have good mechanical properties, low abradability and resistance to climatic impacts. However, they have a relatively large water absorption, the task of reducing which is relevant not only in Russia but also in other countries where constructing facilities operating under the external environmental conditions. Modification of such materials in this work was carried out by replacing part of the wood filler by a mineral filler CaCO₃ (chalk). Partial replacement of wood flour with chalk led to a noticeable decrease in swelling from 1.25 to 0.01%. Herewith, the modulus of elasticity is increased from 2260 to 2880 MPa, tensile strength varies from 30.5 to 16.7–32 MPa. The specific impact viscosity is slightly reduced from 8.9 to 7.74 kJ/m². The optimal ratio of wood and mineral fillers is 60/40%.

A.A. ASKADSKII^{1, 2}, Doctor of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
T.A. MATSEEVICH¹, Doctor of Sciences (Physics and Mathematics) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
V.I. KONDRASHCHENKO³, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) (28, Vavilova Street, Moscow, 119991, Russian Federation)
³ Russian University of Transport (9, Build. 9, Obraztsova Street, 127994, Moscow, Russian Federation)

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