What role do coupling agents play in improving the adhesion between wood fibers and resin in WPC?
Coupling agents play a crucial role in improving the adhesion between wood fibers and resin in Wood-Plastic Composites (WPC). These chemical additives act as a bridge, creating strong bonds between the hydrophilic wood fibers and hydrophobic resin matrix. By modifying the surface properties of wood fibers, coupling agents enhance compatibility, reduce moisture absorption, and increase mechanical strength. Common types include silanes, maleated polyolefins, and isocyanates. The result is a more durable, stable, and high-performance WPC product with improved resistance to weathering and stress. Proper selection and application of coupling agents are key to optimizing WPC quality for various applications.
