Combined impact of 500  keV protons and oxygen plasma on polyimide films

Novikov, L. S.; Воронина, Е. Н.; Chernik, V. N.; Zhilyakov, L. A.; Chirskaya, N. P.

doi:10.1016/j.nimb.2017.08.012

Cited by 13 publications

(5 citation statements)

References 18 publications

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“…Moreover, the formation of C^N bonds has been also observed when polyimide were irradiated by high energy beam. 6,36,37 Fig . 7 shows SEM images of polyimide lm surfaces aer irradiation-load-heating coupling treatment with different electron uences.…”

Section: Resultsmentioning

confidence: 99%

Surface characterization and degradation behavior of polyimide films induced by coupling irradiation treatment

Dong

Shao

et al. 2018

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Surface characterization and degradation behavior of polyimide films induced by coupling irradiation treatment

Dong

Shao

et al. 2018

RSC Adv.

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“…Currently, a number of conventional techniques, such as thermogravimetric analysis (TGA), mechanical property measurements, and spectroscopic analysis, have been attempted to investigate different aging pathways of polymers. , Unfortunately, all these attempts have failed so far for the lack of spatiotemporal resolution. − For example, although TGA and mechanical property measurements could estimate the overall performances of polymers at a macroscopic scale, it is impossible to provide direct information for chemical changes in the backbone of polymers; , Spectroscopic analyses, such as infrared, Raman, nuclear magnetic resonance, and X-ray photoelectron spectroscopies, can be used to provide some information on polymer functional groups. − However, these techniques failed to provide three-dimensional evaluation on polymer aging. Therefore, it is a long-standing challenge to distinguish and quantify the different aging pathways of polymers with high spatiotemporal resolution.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Fluorescent Imaging to Identify Multi-Paths in Polymer Aging

et al. 2021

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It is of great significance to disclose the diverse aging pathways for polymers under multiple factors, so as to predict and control the potential aging evolution. However, the current methods fail to distinguish multiple pathways (multi-paths) of polymer aging due to the lack of spatiotemporal resolution. In this work, using polyimide as a model polymer, the hydroxyl, carboxyl, and amino groups from the polyimide aging process were labeled using specific fluorescent probes through boron-oxygen, imine, and thiourea linkages, respectively. When the excitation and emission wavelengths of each fluorescent probe were controlled, the multi-paths in polyimide aging can be visualized individually and simultaneously in three-dimensional fluorescent images. The overall aging process under hydrothermal treatment was destructured into the pyrolysis and hydrolysis pathways. Three-dimensional dynamic studies discovered that the increased humidity, along with the decreased oxygen content, could hamper the pyrolysis reaction and accelerate the hydrolysis reaction, leading to severe degradation of the overall polyimide aging. More importantly, the oxygen showed a higher regulation coefficient in accelerating the pyrolysis reaction, than the water vapor in motivating the hydrolysis reactions. Such a multidimensional identification methodology is able to guide the long-term use of polymers and control their aging process to a harmless direction in advance by tuning the contents of oxygen and water vapor.

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“…Decayed intensity of C–N bonds was induced by the chain scission of imide structure of PI. Quantified analysis for the varied chemical bonds in PI was carried out by Novikov and co-workers . PI1–5 represented the PI films under irradiation with the proton fluence increased from 0 to 1.0 × 10 15 , 1.0 × 10 15 , 2.5 × 10 15 , 5.0 × 10 15 , and 7.5 × 10 15 cm –2 , respectively.…”

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

“…(C) Varied transmission of polyimide under different fluences of irradiation: PI1:0, PI2:1.0 × 10 15 , pI3:2.5 × 10 15 , PI4:5.0 × 10 15 , PI5:7.5 × 10 15 . Reproduced with permission from ref . Copyright 2017 Elsevier.…”

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

“…The absorption in the UV−vis region for a sample could also be transformed to transmission information, and Novikov et al studied the aging of polyimide (PI) under irradiation of protons by recording the varied transmittance. 112 Transmittance of the PI decreased under irradiation, ascribed to the strong absorption for the generated carbonyl groups (Figure 12C). The absorption edge was shifted toward the visible region, and the bandgap was reduced.…”

Section: Uv Monitoring Onmentioning

confidence: 99%

See 1 more Smart Citation

Characterization Techniques of Polymer Aging: From Beginning to End

Tian

Lin

et al. 2023

Chem. Rev.

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Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure−property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.

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Combined impact of 500 keV protons and oxygen plasma on polyimide films

Cited by 13 publications

References 18 publications

Surface characterization and degradation behavior of polyimide films induced by coupling irradiation treatment

Surface characterization and degradation behavior of polyimide films induced by coupling irradiation treatment

Three-Dimensional Fluorescent Imaging to Identify Multi-Paths in Polymer Aging

Characterization Techniques of Polymer Aging: From Beginning to End

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