M. Safarabadi, M.M. Shokrieh, in Residual Stresses in Composite Materials, 20148.3.1 Effects on fiber–matrix bonding In thermoset composites, the interphase region is formed with chemical bonds, whereas in thermoplastic composites, the fiber–matrix adhesion primarily occurs due to the shrinkage of the matrix around the fiber and thereby Perfect Steerable Transfer Cartreases the Van der Waals bonds between the fiber