Author(s): DAI Likui, SUN Yaoning, WANG Guojian, School of Mechanical Engineering, Xinjiang University
Pages: 52-58
Year: 2019 Issue:  5
Journal: Materials Science and Technology
Keyword:  UV aging; erosion performance; composite material; glass fiber; interface;
Abstract: To investigate the effect of UV aging on the erosion properties of glass fiber reinforced epoxy vinyl ester resin matrix composites,the UV accelerated aging test of glass fiber reinforced epoxy vinyl ester resin composites was carried out,and the erosion test was also performed at the different aging time. Scanning electron microscopy, infrared spectroscopy and differential scanning were used to study the changes of morphology, chemical structure and glass transition temperature before and after aging. The effect of different aging time on the pasteurization hardness, mass loss rate and erosion loss rate are analyzed. The results showed that as the aging time increases, the yellow color on the surface of the sample gradually deepens, and cracking, peeling, and fiber exposure of the resin matrix occur, After 7 days of UV aging, the erosion resistance of the sample was increased by 5.3% and the hardness of the paste was increased by 3%. However, after 56 days of aging, the erosion resistance of the sample was decreased by 15.1% and the hardness of the paste was decreased by 14.6%. After 56 d, the glass transition temperature of the sample was increased by 9.3 ℃. UV aging is a process from the surface to the inside, which first results in the degradation of the surface resin properties. The decomposition of resin matrix、debonding of glass fiber and resin matrix interface and embrittlement of resin matrix also led to the decrease of erosion performance after UV aging.