Fiber takviyeli polimer kompozitler mekanik performansinda arayüzeylerin etkisi

In this study, structure of ?-GPS (?-glycidoxypropyltrimethoxysilane) on glass surfaces after fiber surface treatments was analyzed and effects of the treatments on mechanical properties of glass fiber/epoxy composites were investigated. Fiber surface treatments were used to create the beneficial interface between the fiber and the matrix. Glass fibers were treated using wet chemical and plasma polymerization processes to improve the interfacial adhesion between fiber and matrix.The structure of ?-GPS on glass surfaces after wet chemical and plasma polymerization processes and the interaction between glass surface and ?-GPS were examined using Fourier Transform Infrared Spectroscopy (FT-IR), contact angle measurement device and Scanning Electron Microscopy (SEM). The influence of plasma power and exposure time on the properties of thin films prepared by plasma polymerization of ?-GPS on the glass surfaces was also investigated by X-ray Photo-electron Spectroscopy (XPS). XPS analyses were utilized to reveal the presence of functional groups in the films. Morphologies of the films on the glass surfaces were observed by Atomic Force Microscopy (AFM) and SEM.The effects of fiber surface treatments on mechanical properties of glass fiber/epoxy composites were investigated. Mechanical properties of the composites were investigated by tensile tests, flexural tests and short beam shear tests. The fracture surfaces of the composites were observed with SEM. Mechanical properties of the composites were improved by wet chemical and plasma polymerization studies.Keywords: Glass fiber, Plasma polymerization, Silane treatment, Interface, Interfacial adhesion, Interlaminar shear strength