Ageing of carbon/epoxy and carbon/vinylester composites used in the reinforcement and/or the repair of civil engineering structures

Marouani, S.; Curtil, Laurence; Hamelin, P.

doi:10.1016/j.compositesb.2012.01.001

Cited by 122 publications

(77 citation statements)

References 23 publications

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“…This damage occurs because the chemical solutions penetrate the interface through the micro-voids and micro-cracks. The trapped solution damages the interfacial region (Marouani et al 2012). It is clear from the SEM images that decreasing the strength of the bond has a strong correlation with reduction in tensile strength (Murthy et al 2010).…”

Section: Change In Morphologymentioning

confidence: 87%

“…After a longer soaking time, the composites would accelerate the initiation and propagation of the micro-cracks from the surface, thus contributing to the diffusion process taking place, both within the vinyl ester matrix and within the carbonized particle-vinyl ester matrix interface. Such micro-cracks, under the combined action of chemical diffusion, accelerate the degradation process (Marouani et al 2012). 2.…”

Section: Change In Morphologymentioning

confidence: 99%

“…In addition, carbon fiber improves the strength and stiffness properties of the polymer-matrix. Hence, the durability of vinyl ester composites can be improved by adding carbon fiber into the composite (Marouani et al 2012). Due to a higher carbon content, jatropha seed shell has the potential to produce carbon fiber for use as a filler in polymer-matrix composites (Abdul Khalil et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Environmental Durability of Vinyl Ester Composites Filled with Carbonized Jatropha Seed Shell

Aprilia¹,

Hossain²,

Abdullah³

et al. 2015

BioResources

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The durability of vinyl ester composites filled with carbonized jatropha seed shell was investigated in 5% NaOH solution, 5% HCl solution, and distilled water for 12 months. The environmental durability of the composites was determined by measuring weight changes, flexural properties, and tensile properties. Results showed weight gain and changes in the mechanical properties of the composites due to the soaking time in alkaline, acidic, and neutral environments. It was observed that vinyl ester composites had the highest tensile properties in alkaline environments. The highest flexural properties of the vinyl ester composites were observed in an alkaline environment. Scanning electron microscope image analysis revealed that the surface of the vinyl ester composites was rough and that the original luster was lost after soaking in alkaline solution, acidic solution, and distilled water for 12 months.

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Section: Change In Morphologymentioning

confidence: 87%

Section: Change In Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental Durability of Vinyl Ester Composites Filled with Carbonized Jatropha Seed Shell

Aprilia¹,

Hossain²,

Abdullah³

et al. 2015

BioResources

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“…The reason for this decreased recovery is due to the possibility of aging [17][18][19], and will be explored in further research. Based on the results obtained, it was shown that PVC and PVA have a limited effect on healing efficiency compared to PDGEBA.…”

Section: Izod Impact Testmentioning

confidence: 99%

Solid state self-healing system: Effects of using PDGEBA, PVC and PVA as linear healing agents

Muhamad

Jamil²,

Abdullah³

2014

AIP Conference Proceedings

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Abstract.The solid state self-healing system was obtained by employing a thermosetting epoxy resin, into which a thermoplastic is dissolved. In this study, the effect of healing efficiency was investigated by using different thermoplastic polymers which are poly(bisphenol-A-co-epichlorohydrin), polyvinyl chloride and polyvinyl alcohol as healing agents. Healing was achieved by heating the fractured resins to a specific temperature i.e. above their glass transition temperature (Tg) which obtained from dynamic mechanical analysis (DMA) to mobilize the polymeric chains of the healing agent. The curing reaction in the epoxy resins were characterized by means of Fourier transform infrared spectroscopy (FTIR). Izod impact test was been performed to demonstrate self-healing of the different specimens. Under test, it was found that healable resin with PDGEBA has highest healing efficiency followed by PVC and PVA, with 63%, 35% and 18% of average percentage healing efficiencies respectively. These results are due to the different solubility parameters of the thermoset/network and thermoplastic polymer which led to the phase separation. Morphological studies prove the fracture-healing process and morphological properties of the resins.

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“…Epoxy-based materials are utilized in many engineered structures, ranging from large civil infrastructures [1] to microelectronics [2] because they offer strong mechanical properties along with thermal and chemical stability. An important field of application is the one of carbone/epoxy composites that exhibit adaptability during the design [3] and high-level integration during the manufacturing process [4].…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions

Yagoubi

Lubineau

Saghir

et al. 2014

Polymer Degradation and Stability

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tIn this paper, we study the hygrothermal aging of an anhydride-cured epoxy under temperature and hygrometry conditions simulating those experienced by an aircraft in wet tropical or subtropical regions. Gravimetric and dimensional measurements were performed and they indicate that there are three stages in this aging process: the first one, corresponding to the early cycles can be called the "induction stage". The second stage of about 1000 cycles duration, could be named the "swelling stage", during which the volume increase is almost equal to the volume of the (liquid) water absorbed. Both the first and second stages are accompanied by modifications of the mechanical properties and the glass transition temperature. During the third ("equilibrium") stage, up to 3000 cycles, there is no significant change in the physical properties despite the continuous increase of water uptake. This can be explained by the fact that only physically sorbed water can influence physical properties.

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Ageing of carbon/epoxy and carbon/vinylester composites used in the reinforcement and/or the repair of civil engineering structures

Cited by 122 publications

References 23 publications

Environmental Durability of Vinyl Ester Composites Filled with Carbonized Jatropha Seed Shell

Environmental Durability of Vinyl Ester Composites Filled with Carbonized Jatropha Seed Shell

Solid state self-healing system: Effects of using PDGEBA, PVC and PVA as linear healing agents

Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions

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