文献类型：期刊文献

英文题名：Effects of mixed acid solution on bromide epoxy vinyl ester and its glass fiber reinforced composites

作者：Huang, Lingli[1];Hou, Ruigang[1];Liu, Yujian[1];Shang, Qidong

机构：[1]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai, Peoples R China

年份：2021

卷号：63

期号：3

起止页码：203

外文期刊名：MATERIALS TESTING

收录：;EI(收录号：20214211039986);WOS:【SCI-EXPANDED(收录号:WOS:000636794000001)】；

语种：英文

外文关键词：Fiber reinforced plastics; mixed acid medium; accelerated aging test; long-term performance; corrosion degradation mechanism

摘要：As fiber reinforced plastics (FRP) have been increasingly widely used, they may sometimes come into contact with several corrosive media simultaneously, for example, the condensate in the smokestack liners of coal-fired power FGD systems. To study the long-term performance and degradation mechanism of FRP in these complicated environments, an accelerated aging test of bromide epoxy vinyl ester (Br-VE) and its glass fiber reinforced composites (GF/VE) in a mixed acid solution(H2SO4, HNO3, HF and HCl) at three different temperatures(25, 55 and 80 degrees C) for 180 days was carried out. Weight changes, flexural properties, Fourier transforming infrared spectra (FTIR), dynamic thermal mechanical (DMA), macroscopic and microscopic morphology were investigated. Results showed that immersion temperature has important effects on the corrosion behavior of specimens. The long-term weight change behavior of GF/VE at normal temperature was in accordance with Fick's second law, but deviated at higher temperature. Flexural properties of GF/VE declined more drastically than those of Br-VE at elevated temperatures. The T-g of GF/VE decreased with rising temperatures. Results also indicted that Br-VE and GF/VE manifested varied degradation mechanisms when subject to the same mixed acid medium immersion. The degradation of GF/VE mainly involved plasticization, embrittlement, the hydrolysis of resin, an ion exchange between HF, H+ and Si-O-Si or alkali metal of the fiber as well as the debonding of the resin/fiber interface.