Effect of γ-Irradiation on the Gel-Forming Capability of a Crosslinked Acrylic Polymer

Shaimukhametova, I. F.; Shigabieva, Yu. A.; Bogdanova, S. A.; Allayarov, S. R.

doi:10.1134/s0018143920020149

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…In polymer materials, the displacement effect will cause some atoms in the molecule chain to change from the original position to bond breakage, resulting in the degradation of the molecular chain. Covalent bond breakage leaves the atoms in an unpaired electronic state and then generates free radicals [ 23 ]. The charged particles will interact with atoms in the outer layer of polymer, generating electron excitation and causing ionization, which may also generate free radicals in the molecular chain.…”

Section: Resultsmentioning

confidence: 99%

Study on the Microstructure of Polyether Ether Ketone Films Irradiated with 170 keV Protons by Grazing Incidence Small Angle X-ray Scattering (GISAXS) Technology

Yang

Tian

et al. 2020

Polymers

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Polyether ether ketone (PEEK) films irradiated with 170 keV protons were calculated by the stopping and ranges of ions in matter (SRIM) software. The results showed that the damage caused by 170 keV protons was only several microns of the PEEK surface, and the ionization absorbed dose and displacement absorbed dose were calculated. The surface morphology and roughness of PEEK after proton irradiation were studied by atomic force microscope (AFM). GISAXS was used to analyze the surface structural information of the pristine and irradiated PEEK. The experimental results showed that near the surface of the pristine and irradiated PEEK exists a peak, and the peak gradually disappeared with the increasing of the angles of incidence and the peak changed after irradiation, which implies the 170 keV protons have an effect on PEEK structure. The influences of PEEK irradiated with protons on the melting temperature and crystallization temperature was investigated by differential scanning calorimetry (DSC). The DSC results showed that the crystallinity of the polymer after irradiation decreased. The structure and content of free radicals of pristine and irradiated PEEK were studied by Fourier transform infrared spectroscopy (FTIR) and electron paramagnetic resonance (EPR). The stress and strain test results showed that the yield strength of the PEEK irradiated with 5 × 1015 p/cm2 and 1 × 1016 p/cm2 was higher than the pristine, but the elongation at break of the PEEK irradiated with 5 × 1015 p/cm2 and 1 × 1016 p/cm2 decreased obviously.

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Section: Resultsmentioning

confidence: 99%

Study on the Microstructure of Polyether Ether Ketone Films Irradiated with 170 keV Protons by Grazing Incidence Small Angle X-ray Scattering (GISAXS) Technology

Yang

Tian

et al. 2020

Polymers

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“…However, the ion irradiation of polymers is accompanied by radiation-induced effects, which School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China changes drastically the structure and properties of irradiated material. [13][14][15] The ion irradiation will cause degradation of polymeric chains, chemical bond cleavage, creating of free radicals and release of gaseous degradation products. 16 The subsequent transient chemical reactions of highly reactive species will lead to creation of excessive double bonds, 17 production of low mass stable degradation products, large cross-linked structures and eventually oxidized structures.…”

Section: Introductionmentioning

confidence: 99%

Influence of 25 MeV Si ions and 25 MeV O ions on the chemical and structural properties of PEEK films

Yang

2020

High Performance Polymers

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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.

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Influence of γ-radiation on thermal destruction of a cross-linked acrylic polymer

Allayarov

Confer

Bogdanova

et al. 2021

Polymer Degradation and Stability

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Effect of γ-Irradiation on the Gel-Forming Capability of a Crosslinked Acrylic Polymer

Cited by 7 publications

References 5 publications

Study on the Microstructure of Polyether Ether Ketone Films Irradiated with 170 keV Protons by Grazing Incidence Small Angle X-ray Scattering (GISAXS) Technology

Study on the Microstructure of Polyether Ether Ketone Films Irradiated with 170 keV Protons by Grazing Incidence Small Angle X-ray Scattering (GISAXS) Technology

Influence of 25 MeV Si ions and 25 MeV O ions on the chemical and structural properties of PEEK films

Influence of γ-radiation on thermal destruction of a cross-linked acrylic polymer

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