Poly (ether ether ketone) (PEEK) material can be used in a wide variety of fields, such as the aerospace, automotive, electronics, and nuclear industries. In this research, the irradiation effect of 25 MeV Si ions and 25 MeV O ions on the PEEK films was studied, focusing on the changes in chemical and structural properties. By analyzing surface morphology and microstructure evolution of the PEEK films after 25 MeV Si ion and 25 MeV O ion irradiation, particles were generated on surface of the PEEK after 25 MeV Si ion irradiation and black dots were generated on surface of the PEEK after 25 MeV O ion irradiation. The irradiation reduced the surface roughness of the PEEK films from the atomic force microscopy (AFM) results. The Fourier transform infrared (FTIR) results indicated that the groups and structure of the material were not changed by irradiation. The X-ray photoelectron spectroscopy (XPS) results showed that the contents of the chemical bonds C–C, C=O increased first and then decreased with the increasing of the fluences. The generated free radicals were observed by the electron paramagnetic resonance spectroscopy (EPR) at room temperature and the irradiation degradation mechanisms were analyzed. Thermal properties of the PEEK irradiated by 25 MeV O ions, indicating that a new secondary crystallization peak was found during the cooling stage. Consequently, the low fluences irradiation improves in the viscoelasticity and mechanical properties of PEEK films, while the high fluences irradiation reduces its performance.
Diez-PascualAMDiez-VicenteAL. Development of nanocomposites reinforced with carboxylate poly(ether ether ketone) grafted to zinc oxide with superior antibacterial properties. ACS Appl Mater Interf2014; 6(5): 3729–3741.
2.
XuJHuangXDavimJP, et al.On the machining behavior of carbon fiber reinforced polyimide and PEEK thermoplastic composites. Polym Compos2020; 41: 3649–3663.
3.
LiBWangXMaoB, et al.Improving the mechanical properties of Cf/PEEK composite by implanting functionalized multi-wall carbon nanopaper. Appl Compos Mater2020; 27: 479–490.
4.
PatelPStecAAHullTR, et al.Flammability properties of PEEK and carbon nanotube composites. Polym Degrad Stabil2012; 97(12): 2492–2502.
5.
DavimPCardosoR. Effect of the reinforcement (carbon or glass fibers) on friction and wear behavior of the PEEK against steel surface at long dry sliding. Wear2009; 266(7–8): 795–799.
6.
AlnajraniMNAlosimeEMBasfarAA. Influence of irradiation crosslinking on the flame-retardant properties of polyolefin blends. J Appl Polym Sci2020; 137: 48649.
7.
KaliaRSharmaJKKaliaS. Swift heavy ion irradiation effects on dielectric constant and dielectric loss in poly(ether ether ketone) (PEEK). Adv Mater Proc2018; 3(3): 146–150.
8.
AuimviriyavatJChangkhamchomSSiricatA. Development of poly(ether ether ketone) (PEEK) with inorganic filler for direct methanol fuel cells (DMFCS). Ind Eng Chem Res2011; 50(22): 12527–12533.
9.
WakelinEAFathiAKracicaM, et al.Mechanical properties of plasma immersion ion implanted PEEK for bioactivation of medical devices. ACS App Mater Interf2015; 7(41): 23029–23040.
10.
LiHYangJDongS, et al.Low dielectric constant polyimide obtained by four kinds of irradiation sources. Polymers2020; 12(4): 879.
11.
TanakaSEnokiTImotoH, et al.Highly efficient singlet oxygen generation and high oxidation resistance enhanced by arsole-polymer-based photosensitizer: application as a recyclable photooxidation catalyst. Macromolecules2020; 53(6): 2006–2013.
12.
XuS XXuJZhangJ. Surface topography and cooling effects in poly(vinyl chloride) (PVC)/titanium dioxide (TiO2) composites exposed to UV-irradiation. Iran Polym J2018; 27: 1011–1022.
13.
YanXLiWMAberleAG, et al.Surface texturing studies of bilayer transparent conductive oxide (TCO) structures as front electrode for thin-film silicon solar cells. J Mater Sci Mater Electron2015; 26: 7049–7058.
14.
ShaimukhametovaIFShigabievaYABogdanovaSA. Effect of γ-irradiation on the gel-forming capability of a crosslinked acrylic polymer. High Energy Chem2020; 54: 111–114.
15.
SunithaVRRadhakrishnanS. Gamma irradiation effects on conductivity and dielectric behaviour of PEO-based nano-composite polymer electrolyte systems. Polym Bull2020; 77: 655–670.
16.
QuanDDeeganBByrneL, et al.Rapid surface activation of carbon fibre reinforced PEEK and PPS composites by high-power UV-irradiation for the adhesive joining of dissimilar materials. Compos A Appl Sci Manuf2020; 137: 105976.
17.
MadhiIMeddebWBouzidB, et al.Effect of temperature and NO2 surface adsorption on electrical properties of screen printed ITO thin films. Appl Surf Sci2015; 355: 242–249.
18.
TianFOhkiY. Charge transport and electrode polarization in epoxy resin at high temperature. J Phys D Appl Phys2014; 47: 045311–045319.
19.
KornackaEMPrzybytniakGNowickiA. Radical processes initiated by ionizing radiation in PEEK and their macroscopic consequences. Polym Adv Technol2019; 30: 79–85.
XiaXShiXLiuW, et al.Effects of gamma irradiation on properties of PLA/flax composites. Iran Polym J2020; 29: 581–590.
22.
HasegawaYOhkiYFukunagaK, et al.Complex permittivity spectra of various insulating polymers at ultrawide-band frequencies. Electr Eng J2017; 198(3): 63–68.
23.
WeiCLChenMYuFE. Temperature modulated DSC and DSC studies on the origin of double melting peaks in poly(ether ether ketone). Polymer2003; 44(26): 8185–8193.
24.
BlundellDJOsbornBN. The morphology of poly(aryl-ether-ether-ketone). Polymer1983; 24(8): 953–958.
25.
RivalGPaulmierTDantrasE. Influence of electronic irradiations on the chemical and structural properties of PEEK for space applications. Polym Degrad Stabil2019; 168: 108943.
26.
Al LafiAGAlzierAAllafAW. Two-dimensional FTIR spectroscopic analysis of crystallization in cross-linked poly(ether ether ketone). Int J Plast Tech2020; 24: 1–8.
27.
YukiUNoriakiTIsaoY. Surface modification of poly(ether ether ketone) with methacryloyl-functionalized phospholipid polymers via self-initiation graft polymerization. J Biomater Sci Polym Ed2014; 25(9): 895–906.
28.
HairongTZheXWeihuaL, et al.Oxidation effects of poly(ether-ether-ketone) induced by electron-beam irradiation. J Radiat Res Radiat Process2019; 37(2): 020201.
29.
VogelBDilgerHRodunerE. Rapid radical degradation test of polyaromatic fuel cell membranes by electron paramagnetic resonance. Macromolecules2010; 43(10): 4688–4697.
30.
SzöcsFPlačekJ. Effect of pressure on free-radical decay in irradiated polycarbonate. J Macromol Sci B Phys1977; 13(1): 151–158.
31.
GiancaterinaSRossiARivatonA, et al.Photochemical evolution of poly(ether ether ketone). Polym Degrad Stabil2000; 68(1): 133–144.
32.
RichaudEFerreiraPAudouinL, et al.Radiochemical ageing of poly(ether ether ketone). Eur Polym J2010; 46(4): 731–743.
33.
HegazyESASasugaTNishiiM, et al.Irradiation effects on aromatic polymers: 2. Gas evolution during electron-beam irradiation. Polymer1992; 33(14): 2904–2910.
34.
YangLOhkiYHiraiN, et al.Aging of poly(ether ether ketone) by heat and gamma rays—its degradation mechanism and effects on mechanical, dielectric and thermal properties. Polym Degrad Stabil2017; 142: 117–128.
35.
Al LafiAGParkerDJHayJN. The crosslinking of poly(ether ether ketone): thermally and by irradiation. J Appl Polym Sci2015; 132(22): 41999.
36.
Al LafiAG. Application of 2D correlation methods to the analysis of XPS spectra of ion irradiated poly(ether ether ketone). J Polym Res2018; 25: 105.
37.
PatelPHullTRMcCabeRW, et al.Mechanism of thermal decomposition of poly(ether ether ketone) (PEEK) from a review of decomposition studies. Polym Degrad Stabil2010; 95(5): 709–718.
38.
LvMWangYWangQ, et al.Effects of individual and sequential irradiation with atomic oxygen and protons on the surface structure and tribological performance of polyetheretherketone in a simulated space environment. RSC Adv2015; 5: 83065–83073.
