Assessment of transport kinetics and chemo-mechanical properties of GF/Epoxy composite under long term exposure to sulphuric acid

Padarthi, Yashwanth; Mohanta, Santoshi; Gupta, Jeetendra Kumar; Neogi, Sudarsan

doi:10.1016/j.polymdegradstab.2020.109436

Cited by 14 publications

(4 citation statements)

References 37 publications

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“…This band is probably related to the presence of carbonyl groups derived from the partial resin degradation. These results agree with those reported in the literature [14,15]. In addition, SEM micrographs (Figure 2b) of the samples (FEI, XL20 Scanning Electron Microscope), obtained after gold metallization, highlighted that the treatment affects only the surface of the scraps.…”

Section: Composites Waste Scrapssupporting

confidence: 92%

Alkali-Activated Mortars Modified by Epoxy-Carbon Fiber Composites Wastes

et al. 2021

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Short chopped fibers coated by epoxy resin of different length (5 to 10 mm length) were added at low volume content (about 4.6% on the composite) to alkali-activated fly ash or metakaolin mortars. These uncured scraps derive from the production of carbon fiber-reinforced polymer composites and they are not presently recycled, despite their outstanding mechanical properties. The workability, microstructure, porosity, and physical and mechanical properties (mainly flexural strength) of the derived materials were investigated. Superior flexural strength and increased toughness were obtained. An acid treatment of the scraps further improved the mechanical properties of the mortars by changing the chemical structure of the surface, thus increasing the interaction with the inorganic phase. These results foster the use of these wastes to improve the performance of low carbon footprint building materials such as alkali-activated composites in the building industry.

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Section: Composites Waste Scrapssupporting

confidence: 92%

Alkali-Activated Mortars Modified by Epoxy-Carbon Fiber Composites Wastes

et al. 2021

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“…[5][6][7] Apart from moisture, other harsh media also affects the performance of these materials as reported in several research works in the past. [8][9][10][11] Additionally, the effects of harsh media on natural fiber reinforced composites are also reported by several researchers. [12,13] Recently, Chang et al [14] have reported the durability of basalt fiber reinforced polymer (BFRP) laminas exposed to solutions of normal concrete (NC) and seawater sea sand concrete by acceleration of temperature.…”

Section: Introductionmentioning

confidence: 89%

Insight into the nondestructive performance evaluation of fiber‐reinforced polymer composite laminate immersed in produced water using embedded fiber Bragg grating sensor

et al. 2021

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Fiber-reinforced polymer (FRP) composites are exposed to various corrosive media during their service life, which adversely affects their material properties. Here, a novel approach is developed to investigate the long-term performance of glass FRP composite laminate immersed in produced water generated in oil fields. This is achieved by monitoring the internal hygroscopic strain developed over the aging time using embedded fiber Bragg grating sensor. Composite material strength reduction over the immersion time is evaluated by conducting destructive mechanical tests at regular intervals, and the mechanism of property degradation is established. It is observed that property degradation follows first-order kinetics and absorption of produced water medium obeys dual-sorption diffusion kinetics. Moreover, the strain developed within the composite laminate is formulated by considering the unified influence of swelling and chemical degradation. The predicted strain closely interprets the experimentally recorded strain. This work proves that the strain measurement is an effective nondestructive technique to estimate the property of FRP composite laminates on a real-time basis.

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“…In recent decades, a few investigations have been performed to evaluate the properties of FRP composites under water, high humidity, hot and humidity or acid solution [7][8][9][10]. A study demonstrated that the corrosion rate of glass ber/vinyl ester resin in 40 wt% H 2 SO 4 solution increased with immersion time and temperature [11].…”

Section: Introductionmentioning

confidence: 99%

Degradation evolution and mechanism of sheet molding compound with variable composition exposed to acid solution environment

Li,

Fu,

Ming

et al. 2024

Preprint

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In the present work, the sheet molding compound (SMC) composites with variable filler, resin and fiber composition were prepared to investigate the effects of composition on acid resistance of SMC composites. The water absorption of SMC composites with various compositions was measured to estimate the influence of water on mechanical properties deterioration. Hardness and flexural properties tests were performed to investigate the degradation evolution. The degradation mechanism was revealed by analyzing the change of molecule configuration and evaluating the thermal stability. A minimum reduction of the flexural strength (3.21%) was observed on the SMC composites with 11.3 wt% hollow glass microspheres (HGMs). The chemical resistance and addition amount of the fillers had significant impacts on the acid resistance of SMC composites. A great flexural property and a minor degradation of flexural strength (6.29%) and modulus (7.86%) was obtained in SMC composites with the mixed resin. The resin characteristics, molecules weight, free volume size and polar groups number, had an important impact on the water absorption and acid resistance of SMC composites. A high flexural property and minor degradation of flexural strength (5.12%) and modulus (7.66%) was observed in SMC composites with 55 wt% glass fibers (GFs). Exposed to 25 ℃, 20 wt% sulfuric acid solution for 28 days, the SMC composites exhibited a minor degradation of HGMs and GFs. In this condition, the deterioration of mechanical properties was dominated by the resin matrix plasticization and decomposition, along with the interface degradation. It can be concluded that the original defects and weak interacted regions in the composites system initiated the degradation of SMC composites, while the microstructure and composition of SMC composites dominated the degradation progress.

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Assessment of transport kinetics and chemo-mechanical properties of GF/Epoxy composite under long term exposure to sulphuric acid

Cited by 14 publications

References 37 publications

Alkali-Activated Mortars Modified by Epoxy-Carbon Fiber Composites Wastes

Alkali-Activated Mortars Modified by Epoxy-Carbon Fiber Composites Wastes

Insight into the nondestructive performance evaluation of fiber‐reinforced polymer composite laminate immersed in produced water using embedded fiber Bragg grating sensor

Degradation evolution and mechanism of sheet molding compound with variable composition exposed to acid solution environment

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