
Carbon Fiber Sizing Chemistry: How Sizing Agents Affect Interface Bonding and Composite Performance
Sizing is a thin polymer coating applied during carbon fiber manufacturing that controls fiber-matrix adhesion, handleability, and composite interlaminar shear strength. This article reviews epoxy, polyurethane, and thermoplastic sizing chemistries, their compatibility with different resin systems, and how sizing content (0.5–5%) affects composite mechanical properties.








