Dielectric relaxation behavior of C5+ (70 MeV) swift heavy ion irradiated polyetheretherketone (PEEK) using TSDC technique

Kalia, Rajesh; Sharma, Vandana; Mahna, S. K.; Sharma, Jyoti

doi:10.1134/s0965545x14060169

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The increase in maxima or peak height with increasing fluence suggests that shallow energy traps have been created having a transition in the vicinity of α-relaxation. The increase in maxima or peak height of α-relaxation is also supported by TSDC analysis [23].…”

Section: Irradiated Samplesmentioning

confidence: 53%

Swift Heavy ion irradiation effects on dielectric constant and dielectric loss in poly (ether ether ketone) (PEEK)

Kalia¹,

Sharma²,

Kalia³

2021

Advanced Materials Proceedings

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The dielectric constant (ε') and dielectric loss (ε‫)״‬ of pristine and C 5+ (70 MeV) ion irradiated samples of the PEEK have been investigated with the variation of temperature at different frequencies (100 Hz, 1 kHz, 10 kHz and 100 kHz). The maxima are obtained around 170 o C in dielectric constant (ε') vs. temperature (T) curve. This relaxation is linked with the movement of ketone (>C=0) dipoles linked to the main chain. The irradiation of polymers increases the orientational polarization due to increase in number of dipoles with fluence. The increase in dielectric constant (ε') and dielectric loss (ε'') is attributed to chain scissioning at higher fluence which results in an increase of free radicals and unsaturations.

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Section: Irradiated Samplesmentioning

confidence: 53%

Swift Heavy ion irradiation effects on dielectric constant and dielectric loss in poly (ether ether ketone) (PEEK)

Kalia¹,

Sharma²,

Kalia³

2021

Advanced Materials Proceedings

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“…Polyarylene ether nitrile (PEN), a kind of high-performance thermoplastic aromatic polymer, shows high heat resistance, flame retardancy, radiation resistance, excellent mechanical strength, outstanding flexibility and formability [14][15][16][17]. In addition, PEN still has significant advantages over other thermoplastic resins such as thermoplastic polyimide (TPI) [18] and polyetheretherketone (PEEK) [19], including low processing temperature (~280 °C), high temperature resistance (>450 °C) and short molding time (0.5~1 h), and these advantages are beneficial for processing PEN into various forms to meet the dielectric applications. In this work, barium titanate@zinc phthalocyanine/graphene oxide (BT@ZnPc-GO) nanoparticles with different GO contents were firstly prepared by electrostatic adsorption between BT@ZnPc and GO nanoparticles with the action of calcium ion, and the obtained nanoparticles are characterized in detail.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of BaTiO3-Loaded Graphene Nanosheets-Based Polyarylene Ether Nitrile Nanocomposites with Enhanced Dielectric and Crystallization Properties

Liu

Wang

et al. 2019

Nanomaterials

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In this paper, barium titanate@zinc phthalocyanine (BT@ZnPc) and graphene oxide (GO) hybrids (BT@ZnPc-GO) connected by calcium ions are prepared by electrostatic adsorption, and then introduced into polyarylene ether nitrile (PEN) to obtain composites with enhanced dielectric and crystallization properties. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) results confirm the successful fabrication of the BT@ZnPc-GO. BT@ZnPc-GO and PEN composites (BT@ZnPc-GO/PENs) are obtained through the solution-casting method. BT@ZnPc-GO demonstrates well compatibility with PEN due to its unique structure and the organic layer of ZnPc at the periphery of BT. On the other hand, BT and GO contribute a high dielectric constant of the composites obtained. In addition, the BT@ZnPc-GO can be used as a nucleating agent to promote the crystallization of the nanocomposites. As a result, The BT@ZnPc-GO/PEN exhibits a dielectric constant of 6.4 at 1 kHz and crystallinity of 21.03% after being isothermally treated at 280 °C for 2 h at the GO content of 0.75 wt %. All these results indicate that the hybrid nanofiller BT@ZnPc-GO can be an effective additive for preparing high-performance PEN-based nanocomposites.

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“…Numerous researches have examined how PEEK and its composites react to various radiation sources, such as heavy ions [ 12 , 13 , 14 ], gamma rays [ 15 , 16 ], UV radiation [ 17 ], or combined with aging [ 18 ] and electron irradiation [ 19 , 20 ] since the polymer was first commercialized in 1978. These methods are very effective for controlling various properties of materials including polymers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

et al. 2023

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In this work, the mechanical and tribological characteristics of polyetheretherketone (PEEK) sheets were enhanced by electron beam irradiation. PEEK sheets irradiated at a speed of 0.8 m/min with a total dose of 200 kGy achieved the lowest specific wear rate of 4.57 ± 0,69 (10−6 mm3/N−1m−1), compared to unirradiated PEEK with a rate of 13.1 ± 0.42 (10−6 mm3/N−1m−1). Exposure to an electron beam at 9 m/min for 30 runs, with a dose of 10 kGy per run for a total dose of 300 kGy, resulted in the highest improvement in microhardness, reaching 0.222 GPa. This may be due to the decrease in crystallite size, as indicated by the broadening of the diffraction peaks in the irradiated samples. According to the results of thermogravimetric analysis, the degradation temperature of the irradiated samples remained unchanged at 553 ± 0.5 °C, except a sample irradiated at dose 400 kGy, where the degradation temperature shifted towards a lower position of 544 ± 0.5 °C. Differential scanning calorimetry results revealed that the melting temperature () of the unirradiated PEEK was about 338 ± 0.5 °C, while a high temperature shift of the was observed for the irradiated samples.

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Dielectric relaxation behavior of C5+ (70 MeV) swift heavy ion irradiated polyetheretherketone (PEEK) using TSDC technique

Cited by 5 publications

References 19 publications

Swift Heavy ion irradiation effects on dielectric constant and dielectric loss in poly (ether ether ketone) (PEEK)

Swift Heavy ion irradiation effects on dielectric constant and dielectric loss in poly (ether ether ketone) (PEEK)

Fabrication of BaTiO3-Loaded Graphene Nanosheets-Based Polyarylene Ether Nitrile Nanocomposites with Enhanced Dielectric and Crystallization Properties

Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

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