Preparation of Z-pin from Different Resin and Evaluation of Interlaminar Reinforcement Effect by Pullout Test

摘要

A specific type of bismaleimide resin (BMI) was synthesized and a kind of epoxy resin was formulated to prepare Z-pins reinforced by T300 carbon fiber with diameters of 0.3 mm and 0.5 mm, respectively. Glass transition temperature (T_g) was measured by dynamic mechanical thermal analysis (DMTA) and interlaminar shear strength of Z-pins was tested by short beam shear method. The combination force between Z-pins and laminates was characterized by a special pullout test. The adhesion force/maximum pullout force per unit area between Z-pins and laminates was compared and the combination forces between the Z-pins and laminates were characterized. The results showed that Z-pins based on BMI resin exhibited higher interlaminar reinforcement effect toward T700/5429 composite, concluding that co-bonding between Z-pins and prepreg plays an important role in reinforcing the laminated composites.