Abstract: Modified glass fiber (GF) was prepared through electrostatic absorption method and compounded with polyamide 66(PA66) by a twin-screw extruder. Scanning electron microscopy (SEM) images of the fractured and etched surfaces demonstrated that the presence of P22 on GF surfaces could induce the crystallization of PA66 molecules. The anhydride group of EMA could react with the amino group at the end of PA66 molecule chain leading to the adhesion of PA66 on GF surface. Thus a better interfacial adhesion between GF and PA66 matrix was obtained. The interlaminar shear strength and dynamic storage modulus (25 ℃) of PA66/GF-P22, PA66/GF-EMA, and PA66/GF-EMA-P22 composites increased by 18.3 %, 25.4 %, 32.4 % and 15.4 %, 24.1 %, 34.9 % based on those of PA66/GF composites, respectively.

Key words: Polyamide 66, glass fiber, nucleating agent, ethylene maleic anhydride alternating copolymer, interfacial adhesion