Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Rival, Guilhem; Paulmier, Thierry; Dantras, Éric

doi:10.1016/j.polymdegradstab.2019.108943

Cited by 27 publications

(25 citation statements)

References 33 publications

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“…• For the glass transition temperature increase, it has been previously associated with a chemical cross-linking phenomenon which occurs in the amorphous phase [15]. With increasing ageing temperature, the faster T g increase is explained by a higher cross-link…”

Section: Impact Of Irradiation Temperature On Peek Physical and Chemimentioning

confidence: 97%

“…The procedure of irradiations at room temperature and dose calculations have been already described in a previous study [15]. In the case of irradiations at 165°C, irradiation conditions (apart from sample temperature) and procedure are the same.…”

Section: Experimental Simulation Of Electronic Irradiation Combined Wmentioning

confidence: 99%

“…Absorption tests has already proven that they can be used to study the effect of ageing on polymer materials, especially in order to probe changes in the physico-chemical structure [15].…”

Section: Acetone Absorption Testmentioning

confidence: 99%

“…The experimental procedure for weighing has already been described in our previous study [15]. We present hereafter the equation for weight gain calculations.…”

Section: Acetone Absorption Testmentioning

confidence: 99%

“…In particular, this polymer is used for structural applications in the form of PEEK / Carbon fibre composites such as in the articulated arm of the International Space Station [13] or for mechanical support applications in scientific instruments such as the search-coil magnetometer (SCM) used in the Parker Solar Probe mission [14]. In a previous study [15], PEEK has been exposed, under high-vacuum and at room temperature, to ionising electronic radiation in order to investigate its ageing behaviour for space applications. This study showed that electronic irradiations induce changes of both the amorphous phase (cross-linking) and the crystalline phase (amorphisation).…”

Section: Introductionmentioning

confidence: 99%

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Electronic irradiation ageing in the vicinity of glass transition temperature for PEEK space applications

Rival

Dantras

Paulmier

2020

Polymer Degradation and Stability

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Satellites in space environment are subject to several environmental constraints. In the case of polymer materials, electronic irradiations can induce premature ageing which can lead to a shorter lifetime for the satellite. Moreover, synergistic effects between temperature and irradiation can occur and enhance this ageing. A previous study showed that PolyEtherEther-Ketone (PEEK), a newly used polymer in space industry, presents great radiation tolerance properties. Nonetheless, it was necessary to investigate the influence of temperature factor on its ageing. This study focuses on the comparison of PEEK samples aged at two temperatures: room temperature and 165°C. Irradiations have been performed under high-vacuum and with a mono-energetic electron beam. They led to doses representative of 15 years of exposure to geostationary electronic environment. The comparison between both types of samples showed that increase in irradiation temperature have a significant impact on ageing kinetics. In particular, analyses revealed a higher cross-linking density for 165°C irradiated samples which has been associated with a higher recombination rate of radicals due to amorphous phase mobility increase above glass transition.

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Section: Impact Of Irradiation Temperature On Peek Physical and Chemimentioning

confidence: 97%

Section: Experimental Simulation Of Electronic Irradiation Combined Wmentioning

confidence: 99%

“…Absorption tests has already proven that they can be used to study the effect of ageing on polymer materials, especially in order to probe changes in the physico-chemical structure [15].…”

Section: Acetone Absorption Testmentioning

confidence: 99%

“…The experimental procedure for weighing has already been described in our previous study [15]. We present hereafter the equation for weight gain calculations.…”

Section: Acetone Absorption Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electronic irradiation ageing in the vicinity of glass transition temperature for PEEK space applications

Rival

Dantras

Paulmier

2020

Polymer Degradation and Stability

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Influence of composite preform fabrication on the integrity of poly‐aryl‐ether‐ketone matrices

Almeida

Feuillerat

Nouri

et al. 2021

J of Applied Polymer Sci

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Poly‐Aryl‐Ether‐Ketones (PAEK) matrices of different composite preforms were evaluated to assess the influence of the preform manufacturing on the matrix integrity. Yarns, films, and impregnation suspensions were characterized by gel permeation chromatography, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and rheometry. As described in literature, changes in the matrix properties at molten state are observed for all materials. The degradation process is related to a crosslinking process that results in an increase of viscosity and a decrease of crystallization temperature. Differences in degradation behavior were observed depending on the type of preform. Film and yarn extrusion has a limited effect on PAEK behavior, apart from a slight shift in molecular weight, without significant effect on degradation kinetics. However, the organic products that are used for the preparation of semifinished composite products, that is, yarn sizing or suspension additives, have a detrimental effect on stability. The degradation of additives considerably increases the degradation kinetics of the PAEK matrices, and by modifying the thermo‐oxidation mechanisms, the advantages of using complex preforms for consolidation can be annihilated.

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Effect and mechanism of thermal aging on mechanical properties of continuous carbon fiber‐reinforced PEEK composite laminates

Ma,

Wen,

Wang

et al. 2024

Polymer Composites

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Continuous carbon fiber‐reinforced poly(ether‐ether‐ketone) composites (CCF/PEEK) are widely used in aerospace. However, long‐term service to elevated temperatures induces material aging in CCF/PEEK composite structures, significantly reducing their load‐bearing capacity. In this paper, the mechanisms of thermal aging effects on the mechanical properties of CCF/PEEK composites were investigated. Mechanical performance experiments were conducted on three‐point bending, short beam shear, and double cantilever beam specimens after accelerated aging in the range of 250–300°C. The evolution mechanism of crystallization behavior and aging characteristics was revealed through differential scanning calorimetry and thermogravimetric analysis. The results indicated that thermal aging primarily impacted the mechanical properties of CCF/PEEK composites through changes in crystallization and interfacial properties, which were highly sensitive to aging temperature, particularly with crystallization exhibiting temperature−/time‐ dependent behaviors during aging. The thermal aging environment promoted the growth and perfection of the crystals. However, at higher temperatures, further aging caused cross‐linking and degradation, resulting in a significant decrease in crystallinity following an initial increase. Moreover, the rate of oxidation and decomposition of the sizing agent escalated with increasing aging temperature, which led to a significant decline in interfacial properties. Generally, thermal aging at 250°C contributed to the improvement of bending and interlaminar shear properties of the composites. However, at 300°C, a significant decrease in both bending and interlaminar shear properties, as well as mode‐I interlaminar fracture toughness.Highlights The effect and mechanism of thermal aging on the mechanical properties of continuous carbon fiber‐reinforced poly(ether‐ether‐ketone) composites are investigated within the temperature range of 250–300°C. Thermal aging significantly influences the mechanical properties of the composites primarily by inducing alterations in both crystallization and interfacial properties. The differential scanning calorimetry (DSC) experimental results reveal that the crystallization of the PEEK matrix exhibits temperature−/time‐ dependent behaviors during thermal aging. Further aging at 300°C induces oxidation and decomposition of components such as sizing agents, resulting in interfacial debonding. The experimental results indicate that aging at 250°C is conducive to improving the mechanical properties and thermal stability of the composites.

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Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications

Cited by 27 publications

References 33 publications

Electronic irradiation ageing in the vicinity of glass transition temperature for PEEK space applications

Electronic irradiation ageing in the vicinity of glass transition temperature for PEEK space applications

Influence of composite preform fabrication on the integrity of poly‐aryl‐ether‐ketone matrices

Effect and mechanism of thermal aging on mechanical properties of continuous carbon fiber‐reinforced PEEK composite laminates

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