What resin compatibilizers are used in WPC blends with recycled plastics?

Resin compatibilizers play a crucial role in improving the performance of Wood-Plastic Composite (WPC) blends that incorporate recycled plastics. These additives enhance the interfacial adhesion between the hydrophobic plastic matrix and hydrophilic wood fibers, ensuring better mechanical properties and durability. Common compatibilizers used in such blends include maleic anhydride-grafted polyolefins (e.g., MAPE, MAPP), which chemically bond with both components, and styrene-based copolymers (e.g., SEBS-g-MA), which improve flexibility and impact resistance. Additionally, reactive compatibilizers like glycidyl methacrylate (GMA)-modified polymers are effective for polar-nonpolar interactions. The choice of compatibilizer depends on the type of recycled plastic (e.g., PP, PE, PVC) and the desired properties of the final WPC product. Proper selection ensures optimal processing, strength, and longevity of eco-friendly WPC materials.