Abstract
The service life and properties of Carbon fiber reinforced polycarbonate (CF/PC) composites are seriously affected by ultraviolet radiation from outdoor exposure during aging. In this work, the changes of structure and solid particle erosion resistance for CF/PC composites after ultraviolet irradiation were studied. It was shown that ultraviolet irradiation causes photo-oxygen aging and photo-fries re-arrangement of the composite, and the result was confirmed by FTIR. We correlated the solid particle erosion resistance with aging time, and found that the solid particle erosion resistance of CF/PC composites greatly decreased by UVB irradiation during 15 hours. Furthermore, the eroded material surface was analyzed using scanning electron microscope (SEM). It suggests that ultraviolet aging leads to plasticization and degradation, resulting in reduction of erosion resistance of the composite.
Highlights
Polycarbonate (PC) is a ductile polymer with excellent physical and chemical properties, such as good thermodynamic stability, high strength and high temperature resistance [1]
We correlated the solid particle erosion resistance with aging time, and found that the solid particle erosion resistance of carbon fiber (CF)/PC composites greatly decreased by ultraviolet B rays (UVB) irradiation during 15 hours
Based on the research results of Diepens et al [11] and our infrared test analysis, we found that both photo-fries and photo-oxygen aging occur for CF/PC composites when exposure to UVB irradiation
Summary
Polycarbonate (PC) is a ductile polymer with excellent physical and chemical properties, such as good thermodynamic stability, high strength and high temperature resistance [1]. The aging of PC products is inevitable in the process of service due to temperature, light, heat and other environmental factors [2]. Ultraviolet aging of polycarbonate has been extensively studied. Rivaton et al [6] found that chemical bonds in PC chains(C-C, C-O, and C-H, etc.) are excited and destroyed by ultraviolet light. In order to improve the ultraviolet aging resistance of PC products, carbon fiber (CF) with good chemical stability was used in this work. The aging process of CF/PC composites by ultraviolet B rays (UVB) was investigated. The effects of UVB on solid particle erosion for CF/PC composites were evaluated in this work
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