Used as a compatibilizer in polymer blends, especially in modifying thermoplastic elastomers and improving adhesion between dissimilar polymers. Enhances toughness and impact resistance in polyolefin-based composites. Commonly applied in automotive parts, sealants, and impact modifiers for plastics due to its ability to stabilize morphology and improve mechanical properties. Also utilized in asphalt modification to enhance viscosity, elasticity, and temperature resistance in road paving materials. The maleic anhydride functionality allows covalent bonding with polar substrates, making it effective in multilayer films and adhesives where strong interfacial adhesion is required.