Novel Composites Based on a Natural Raw Material and Silylated Polystyrene
Authors:   Ivane Javakhishvili’ Tbilisi State University, Department of Macromolecular Chemistry, 1 I. Chavchavadze Ave., Tbilisi 0179, Georgia, Tatrishvili Tamara ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia, Mukbaniani Omar , Kvinikadze Nikolozi ,   Ivane Javakhishvili’ Tbilisi State University, Department of Macromolecular Chemistry, 1 I. Chavchavadze Ave., Tbilisi 0179, Georgia,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia, Chikhladze Shota ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia, Bukia Tinatini ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia,   Vladimir Chavchanidze Institute of Cybernetics of the Georgian Technical University, 5 Z. Andjzaparidze St., Tbilisi 0186, Georgia, Petriashvili Gia ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia,   Vladimir Chavchanidze Institute of Cybernetics of the Georgian Technical University, 5 Z. Andjzaparidze St., Tbilisi 0186, Georgia, Pirtskheliani Nana ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia,   Sokhumi State University, Faculty of Natural Sciences, Mathematics, Technologies and Pharmacy, 61 Politkovskaya St., Tbilisi 0186, Georgia, Makharadze Tamar ,   Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 University St., Tbilisi 0186, Georgia,   Vladimir Chavchanidze Institute of Cybernetics of the Georgian Technical University, 5 Z. Andjzaparidze St., Tbilisi 0186, Georgia
Published: February 2025

The present paper discusses the development of new, environmentally friendly composite materials with advantageous properties. These composites are based on plant raw material - pine sawdust and trimethoxysilylated polystyrene (TMSPSt). The binder for the composites was obtained by our research group and used in conjunction with different degrees of silylation (15-35%), in the presence of various organic and inorganic additives, fire retardants, and antioxidants. It simultaneously acts as a reinforcing agent. Wood-polymer composites (WPCs) were created at several pressures (5-15 MPa) and temperatures (473-493 K). The surface structure of the novel composites was examined by a range of techniques, including electron microscopy and energy-dispersive X-ray microanalysis. The mechanical properties of the materials were evaluated through a series of tests, including bending testing, Charpy impact testing, and impact viscosity. A well-established methodology was employed for the investigation of the water absorption properties of the composites. Furthermore, the phase state of the materials was investigated by differential scanning calorimetry (DSC), while thermal stability was determined by Vicat and thermogravimetric analysis (TGA). The optimal conditions for producing new environmentally safe composites have been identified. The composites obtained in this manner exhibit excellent mechanical properties, high thermal resistance, ecological purity, and a low water absorption capacity.