The influence of concentration of the polyethylene grafted maleic anhydride (PEGMA) as a coupling agent on the mechanical and physical properties of wood plastic composites was studied. Scanning electron microscopy (SEM) investigation showed the enhancement of the homogeneity because of the presence of PEGMA. FT-IR results indicated a new created chemical bond at 1734 cm^− 1 between the natural fiber and the polyethylene chains. Thermogravometric analysis (TGA) showed that the thermal stability has been improved. Results shows that the mechanical and physical properties of WPC were enhanced by increasing the amount of added and then decreased after 2% wt. of PEGMA.

Polystyrene (PS) composites containing different concentrations of Palm Trees Fibers (PTF/PS) have been prepared by hot mixing process using Plasti Corder machine. PTF surface have been treated by PS solution to optimize the adhesion between PTF and PS in PTF/PS composite. The study of the abrasion, water absorption and the mechanical properties of the treated and untreated PTF/PS composites showed a significant improvement for the treated composites. The value of the modulus of the elasticity increased by the PS solution treatment from 1.1 GPa to 3.45 GPa for 60% fiber concentration in PTF/PS composites.

This study investigates the effect of micro-glass fillers on the mechanical and thermal properties of natural rubber (NR) composites. Micro-glass particles, derived from recycled glass bottles, were incorporated into the NR matrix at varying concentrations (0%, 10%, 20%, 30%, 40%, and 50%). The composites were prepared using a two-roll mill and vulcanized under controlled conditions. Mechanical properties, including tensile strength, elongation at break, and hardness, were evaluated, along with thermal stability using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results indicate that micro-glass fillers significantly enhance the mechanical properties of NR, with optimal performance observed at 30% filler content. At this concentration, the composite exhibited an elasticity modulus of ~ 54 MPa and tensile strength increased from 4.6 MPa (pure NR) to 8.7 MPa at 30% micro-glass. However, higher concentrations led to reduced ductility and potential agglomeration. Thermal analysis revealed improved heat resistance with increasing filler content, making these composites suitable for applications requiring enhanced mechanical and thermal performance.