X-Ray Photoelectron Spectroscopy of Electron-Acceptor Doped Poly(p-phenlene sulfide)

Shimizu, Hiroshi; Tanabe, Yukito; Kanetsuna, Hisaaki

doi:10.1295/polymj.18.367

Cited by 15 publications

(3 citation statements)

References 6 publications

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“…The spectrum deconvoluted into four peaks: a peak at approximately 284.5 eV binding energy attributed to the carbon bonds from the PPS layer. The binding energy at 284.5 eV corresponding to the C1s spectrum of PPS was reported to be related to carbon atoms in the phenyl rings . The second peak at approximately 285.4 eV corresponds to the adventitious carbon.…”

Section: Resultsmentioning

confidence: 99%

XPS analysis of the interface between AA2024‐T3/CF‐PPS friction spot joints

Goushegir

Scharnagl

Santos

et al. 2015

Surface & Interface Analysis

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*Friction spot joining (FSpJ) is an advanced, alternative technology suitable for joining metal-composite overlap structures. In this paper, the principles of the FSpJ technique are briefly described. Furthermore, the influence of aluminum surface pretreatments (conversion coating and phosphoric acid anodizing) on the adhesion between aluminum alloy AA2024-T3 and carbon-fiberreinforced poly(phenylene sulfide) (CF-PPS) friction spot joints was examined. X-ray photoelectron spectroscopy (XPS) was used to investigate the changes in the chemical composition of the aluminum after surface pretreatments, as well as chemical bond formation at the interface between the aluminum and composite. The joints were mechanically loaded until failure, and the fracture surface of the joints were analyzed on the aluminum side. XPS results showed evidence of Al-C and Zr-C bond formation at the interface for the selected surface pretreatments in the course of the joining cycle. Chemical bond formation was confirmed through the analysis of C1s and Al2p regions in which the appearance of new peaks with different binding energies compared with the aluminum and composite were identified.

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Section: Resultsmentioning

confidence: 99%

XPS analysis of the interface between AA2024‐T3/CF‐PPS friction spot joints

Goushegir

Scharnagl

Santos

et al. 2015

Surface & Interface Analysis

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show abstract

“…It has been discussed (XPS paper) that this peak is attributed to the C bonds from the PPS layer. A binding energy of 284.5 eV corresponding to the C 1s spectrum of PPS was reported to be related to carbon atoms in phenyl rings [63]. After 1800 s of argon etching two small peaks appeared in the C 1s spectrum, one at about 282.1 eV and the other at approximately 289 eV.…”

Section: Fig 19mentioning

confidence: 98%

Friction spot joining (FSpJ) of aluminum-CFRP hybrid structures

Goushegir

2016

Weld World

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The employment of various materials (such as lightweight metal alloys and composites) with distinct physicochemical properties in the automotive and aerospace industries has opened a new field of research into the joining of dissimilar materials. Several alternative methods have recently developed for joining metalcomposite multi-material structures. Friction spot joining (FSpJ) is an innovative technique within welding-based joining technologies suitable for metal-composite structures. This work aims to address and overview different aspects of FSpJ. Case-study overlap joints using aluminum alloy AA2024-T3 and carbon-fiber reinforced poly(phenylene sulfide) (CF-PPS) were produced. Peak temperatures of up to 474°C were recorded during the process. Such temperatures are well below thermal decomposition of PPS and extensive thermal degradation of PPS was not detected by thermal analysis in this work. Microstructure analysis was performed showing usual metallurgical phenomena (recovery and dynamic recrystallization) taking place with friction-based aluminum joining. Microstructural changes caused an alteration to the local mechanical properties as confirmed by microhardness and nanohardness measurements. Moreover, microstructural analysis of the composite part revealed the formation of a small number of volumetric defects such as pores and fiber-matrix debonding. Bonding mechanisms at the interface were studied into details by microscopy analysis and X-ray photoelectron spectroscopy. The influence of various aluminum surface pre-treatments on the bonding mechanisms and mechanical performance of single-lap shear joints was studied. In addition, fatigue life of the joints was investigated using an exponential model to obtain S-N curves. Finally, the quasi-static strength of the friction spot joints was compared with the state-of-the-art adhesive bonding. Friction spot joints showed 50% stronger joints than adhesively bonded joints, indicating the potential of the technique to be used for joining lightweight metals to composite materials.

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“…The electronic structure of doped PPS is unstable in the atmosphere 5 and an XPS study of doped PPS after exposing to air showed the presence of various doping mechanisms depending on dopants. 6 In this paper we mention the in situ measurements of optical absorption and ESR spectra of PPS doped with sulfur trioxide (S0 3 ). Optical absorption spectra are not inconsistent with the bipolaron model but ESR spectra are inconsistent with it.…”

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confidence: 99%

Optical Absorption and ESR Studies of Poly(p-phenylene sulfide) Doped with Sulfur Trioxide

Shimizu

Kanetsuna

Tanabe

1987

Polym J

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ABSTRACT:Optical absorption and ESR spectra of S03-doped poly(p-phenylene sulfide) (PPS) with relatively high conductivity were measured. Two absorption bands were observed at 0.9 and 3.1 e V at the initial doping state. The intensity of these two bands increased with the rise of doping level. ESR spectra with a g-va1ue of 2.0075 were observed for the PPS-S03 system at the same doping level as that of absorption spectra. The intensity of ESR signals increased with the doping level, while the linewidth showed a nearly constant value of 3.6 gauss. The spin density of the PPS-S03 system increased monotonously with the S03 concentration. In both cases of optical absorption and ESR spectra of SOrdoped PPS, the spectral intensity increased slightly under UVlight irradiation, while these spectra were little affected by the near IR-light irradiation. These spectroscopic results suggest the presence of sulfur-centered radical-cations rather than a bipolaron state. Two intense bands of the PPS-S03 system observed at 0.9 and 3

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X-Ray Photoelectron Spectroscopy of Electron-Acceptor Doped Poly(p-phenlene sulfide)

Cited by 15 publications

References 6 publications

XPS analysis of the interface between AA2024‐T3/CF‐PPS friction spot joints

XPS analysis of the interface between AA2024‐T3/CF‐PPS friction spot joints

Friction spot joining (FSpJ) of aluminum-CFRP hybrid structures

Optical Absorption and ESR Studies of Poly(p-phenylene sulfide) Doped with Sulfur Trioxide

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