An overview of endurance and ageing performance under various environmental conditions of hybrid polymer composites

Mayandi, K.; Rajini, N.; Ayrılmış, Nadir; Devi, M. Pramila; Siengchin, Suchart; Mohammad, Faruq; Al‐Lohedan, Hamad A.

doi:10.1016/j.jmrt.2020.11.031

Cited by 50 publications

(26 citation statements)

References 147 publications

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“…On the other hand, the hybrid + MWCNT composite with 500 and 1000 h of exposure showed no significant variation in tensile strength when compared to the unexposed hybrid + MWCNT composite. This can be explained by the fact that nanoparticles can absorb UV rays 43 . Finally, the glass composite samples with 500 and 1000 h of exposure, presented an increase in tensile strength of approx.…”

Section: Resultsmentioning

confidence: 90%

“…This can be explained by the fact that nanoparticles can absorb UV rays. 43 Finally, the glass composite samples with 500 and 1000 h of exposure, presented an increase in tensile strength of approx. 2% and 5%, when compared to unexposed glass composite, while the glass + MWCNT composite with 500 and 1000 h of exposure showed an increase of approx.…”

Section: Effect Of Aging On the Tensile Properties Of Compositesmentioning

confidence: 95%

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Effect of ultraviolet radiation and water spraying on the mechanical properties of multi‐walled carbon nanotubes reinforced natural fiber and hybrid composites

Neto

Queiroz

Cavalcanti

et al. 2021

J of Applied Polymer Sci

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The main objective of this study was to investigate the effect of aging by ultraviolet radiation and water spray on the mechanical properties of natural fiber and hybrid composites. Pure jute, hybrid jute/glass, and glass fiber‐reinforced composites were fabricated. All these types of composites were further modified with 0.6 wt% of multi‐walled carbon nanotubes (MWCNTs) and their mechanical behavior was compared to the unmodified specimens. Tensile and flexural tests were used to measure the mechanical properties of unaged (control) and aged specimens. A scanning electron microscopy analysis was used to examine the fracture surfaces of the specimens tested. It was found that the aging process affected the mechanical properties of the composites studied in different ways. For jute and jute + MWCNT composites the properties decreased with increased exposure time. The hybrid jute/glass composites (unmodified and MWCNT modified) were less affected by aging and showed an insignificant change in tensile strength. The hybrid + MWCNT composites, showed an increase of approx. 7% in Young's modulus (1000 h) and 9% (500 h) and 17%, (1000 h) in flexural modulus when compared to the unexposed specimens. The MWCNTs had a positive effect on the mechanical properties of the glass + MWCNT aged samples.

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Section: Resultsmentioning

confidence: 90%

Section: Effect Of Aging On the Tensile Properties Of Compositesmentioning

confidence: 95%

Effect of ultraviolet radiation and water spraying on the mechanical properties of multi‐walled carbon nanotubes reinforced natural fiber and hybrid composites

Neto

Queiroz

Cavalcanti

et al. 2021

J of Applied Polymer Sci

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“…Conventional synthetic fibre-reinforced composites have been a popular choice for transport and construction industries for the last five decades as a consequence of their high strength-to-weight ratios. However, recent pressures towards a circular economy based on increased sustainability and recyclability of the products, etc., has focused interest on the use of natural fibre reinforcements, as well as biopolymer matrices [ 1 , 2 ]. The usage of such natural fibres has gained momentum due to their advantages in terms of low densities, highly specific strengths and moduli, and biodegradability, compared to glass, for example [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…The usage of such natural fibres has gained momentum due to their advantages in terms of low densities, highly specific strengths and moduli, and biodegradability, compared to glass, for example [ 3 , 4 , 5 ]. Natural fibres may also be used as a secondary reinforcement as hybrids with other synthetic fibres [ 1 , 2 ]. The mechanical properties of composites reinforced with lignocellulosic fibres (such as jute, sisal, flax and hemp), while not sufficiently high for structural applications, are high enough to replace glass fibre-composites for low-cost, low strength applications [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…For marine applications ageing in seawater, usually as NaCl solution is undertaken. While some studies have taken place on the effects of sea water and acidic and alkaline environments by immersing natural fibre-composites in those solutions [ 1 , 20 , 23 , 24 ], there is still a gap in the understanding of their effects on both physical and chemical changes in individual components, which are determining factors for the mechanical and thermal properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Water and Chemical Solutions Ageing on the Physical, Mechanical, Thermal and Flammability Properties of Natural Fibre-Reinforced Thermoplastic Composites

et al. 2021

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Biocomposites comprising a combination of natural fibres and bio-based polymers are good alternatives to those produced from synthetic components in terms of sustainability and environmental issues. However, it is well known that water or aqueous chemical solutions affect natural polymers/fibres more than the respective synthetic components. In this study the effects of water, salt water, acidic and alkali solutions ageing on water uptake, mechanical properties and flammability of natural fibre-reinforced polypropylene (PP) and poly(lactic acid) (PLA) composites were compared. Jute, sisal and wool fibre- reinforced PP and PLA composites were prepared using a novel, patented nonwoven technology followed by the hot press method. The prepared composites were aged in water and chemical solutions for up to 3 week periods. Water absorption, flexural properties and the thermal and flammability performances of the composites were investigated before and after ageing each process. The effect of post-ageing drying on the retention of mechanical and flammability properties has also been studied. A linear relationship between irreversible flexural modulus reduction and water adsorption/desorption was observed. The aqueous chemical solutions caused further but minor effects in terms of moisture sorption and flexural modulus changes. PLA composites were affected more than the respective PP composites, because of their hydrolytic sensitivity. From thermal analytical results, these changes in PP composites could be attributed to ageing effects on fibres, whereas in PLA composite changes related to both those of fibres present and of the polymer. Ageing however, had no adverse effect on the flammability of the composites.

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Effects of meso‐ and micro‐scale defects on hygrothermal aging behavior of glass fiber reinforced composites

et al. 2022

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Design and process-induced defects in fiber-reinforced polymers (FRPs) lead to fracture nucleation due to the stress concentrations. In addition to the degradation in mechanical properties, defects can accelerate aging of FRPs and limit their service life. Efforts to understand the impact of defects have largely focused on the mechanical performance of FRPs. However, their impact on aging performance has not yet been extensively investigated. Here, we report the effect of the meso-scale (missing yarn) and micro-scale (micro-crack) defects on the hygrothermal aging behavior of FRPs. Missing yarn defects were generated by pulling-out yarns in warp and weft directions of glass fabric. Then, micro-cracks were induced in composite laminates by acoustic emission controlled tensile loading/unloading. After exposing samples to the hygrothermal aging, we found that meso-scale defects deteriorate mechanical/ thermomechanical performance, reaching 30% decrease in the flexural strength. Notably, even though increasing micro-crack density reduces the moisture saturation time, the aging time is reported as a more predominant design parameter, deteriorating the mechanical performance for micro-crackinduced FRPs.

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An overview of endurance and ageing performance under various environmental conditions of hybrid polymer composites

Cited by 50 publications

References 147 publications

Effect of ultraviolet radiation and water spraying on the mechanical properties of multi‐walled carbon nanotubes reinforced natural fiber and hybrid composites

Effect of ultraviolet radiation and water spraying on the mechanical properties of multi‐walled carbon nanotubes reinforced natural fiber and hybrid composites

Effects of Water and Chemical Solutions Ageing on the Physical, Mechanical, Thermal and Flammability Properties of Natural Fibre-Reinforced Thermoplastic Composites

Effects of meso‐ and micro‐scale defects on hygrothermal aging behavior of glass fiber reinforced composites

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