Technological factors of formation of the structure of highly filled sand-polymer composites based on regenerated thermoplastic resin

This research looks at the structural and mechanical properties of sand‑polymer composites that are heavily filled and made from recycled thermoplastic resins. The matrix is a recycled mix of polypropylene (PP) and low‑density polyethylene (LDPE) in a 3 : 1 mass ratio, combined with about 75 wt % quartz sand filler. To improve the bond at the interface and cut down on defects, we add tiny amounts (0.01–0.1 wt %) of nanomodifiers—detonation carbon charge and highly dispersed silica (Aerosil‑380)—using extrusion blending with LDPE‑based masterbatches. The study examines how the melt flow index (MFI) changes in a non‑linear way with nanomodifier concentration, which shows physical interactions between the nanoclusters and the

polymer chains. We test peel strength on oxide substrates to see how adhesion improves, and we measure thermally stimulated depolarization (TSD) currents to assess charge‑trap density and supramolecular ordering. The work provides a clear method for analyzing how these nanomodifiers shift thermal transition temperatures and strengthen the recycled polymer‑sand matrix, pointing to a sustainable route for high‑performance construction materials.

Message: Hi FE, I need help with “Technological factors of formation of the structure of highly filled sand-polymer composites based on regenerated thermoplastic resin” in “Chemical Engineering”