IR laser ablative desulfurization of poly(1,4-phenylene sulfide)

Durani, Sardar M. A.; Khawaja, E. E.; Masoudi, Husain M.; Bastl, Zdeněk; Šubrt, Ján; Galíková, Anna; Pola, Josef

doi:10.1016/j.jaap.2005.01.005

Cited by 15 publications

(7 citation statements)

References 29 publications

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“…3 (c), the S 2p peaks with binding energy of 162.1 and 163.2 eV are assigned to sulfur in -SNa [28][29][30] and thioether bond (C-S-C) 27,31 of the polymer, and the weak S 2p peak at binding energy of 166.8 eV is ascribed to the -SO 2and/or -SO 3 -moieties. 32 The absorption band at 1004 cm À1 attributed to the S-O asymmetric mode can be observed in the FTIR spectra. 33 However, the S-O vibration band at 1050-1040 cm À1 would probably overlap with that of C-S stretching vibrations.…”

Section: Resultsmentioning

confidence: 93%

Poly(2,5-dihydroxy-1,4-benzoquinonyl sulfide) (PDBS) as a cathode material for lithium ion batteries

et al. 2011

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An organic cathode material, poly(2,5-dihydroxyl-1,4-benzoquinonyl sulfide) (PDBS), has been synthesized and assessed as a cathode material for lithium ion batteries. The prepared polymer material is characterized by (13)C solid state NMR, FTIR, XPS and elemental analysis techniques. The (13)C solid state NMR, FTIR and XPS results indicate that the chlorine of chloranilic acid (CLA) is successfully substituted by sulfur after a sulfurization reaction. Elemental analysis shows that the prepared polymer is mainly composed of dimer and trimer. The electrochemical measurements show that the initial discharge capacity of PDBS is up to 350 mAh g(-1), and 184 mAh g(-1) still remains after 100 cycles at the current density of 15 mA g(-1) in the voltage range of 1.5-3.6 V. The PDBS also shows high cycling stability, good rate capability and discharge/ charge coulombic efficiency of higher than 98%, except for in the initial cycles. The good cycling stabilities and the high coulombic efficiency of the material are ascribed to the stable thioether bonds for stabilizing the framework of the polymer and the highly reversible carbonyl groups for energy storage.National Natural Science Foundation of China[20873115]; National Basic Research Program of China (973 program)[2007CB209702

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Section: Resultsmentioning

confidence: 93%

Poly(2,5-dihydroxy-1,4-benzoquinonyl sulfide) (PDBS) as a cathode material for lithium ion batteries

et al. 2011

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“…The weak signal at 3,065 cm −1 can be attributed to C-H stretching vibrations of hydrogen atoms placed at the aromatic ring. The signals at 1,490 cm −1 and 1,568 cm −1 can be attributed to C=C vibrations from the benzene ring [86]. The signal at 804 cm −1 can be attributed to the C-H deformation vibration, which is typical for a 1.4 substitution of an aromatic ring system with two neighbouring hydrogen atoms [13].…”

Section: Polyphenylene Sulfide (Pps)mentioning

confidence: 97%

High-Performance Fibres – A Review of Properties and IR-Spectra

Mahltig

2021

TEKS

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High-performance fibres are fibre materials that exhibit at least one extraordinary property compared to con¬ventional fibre materials. That extraordinary property is frequently related to excellent fibre stability against certain influences such as fire, heat, chemicals or light. Also, a high mechanical strength is often a property of high-performance fibres. Nevertheless, it should be noted that high-performance fibres exhibit certain weak¬nesses in addition to their advantages. This review presents a broad overview of the most important high-per¬formance fibres, with a special emphasis on their chemical structure and related infrared spectra (IR-spectra). The categorization of the fibres according to chemical substance classes was performed to make it easy for the reader to find a fibre of interest. The main categories are polyethylene (PE) fibres, polyacrylonitrile (PAN) fibres, polyvinylalcohol (PVAL) fibres, polyester-based fibres, polyamide-based fibres, polyetheretherketone (PEEK) fibres, polyimide (PI) fibres, halogen-containing fibres, polyphenylene sulfide (PPS fibres), resin-based fibres and finally inorganic fibres. Competing materials are also discussed, and structural related materials can be easily identified. In addition to discussing fibre properties and selected applications, one of the main aims is to present a various number of IR-spectra as a tool for structural understanding and to help identify unknown fibres. Here, beside the IR-spectra of high-performance fibres, the reference IR-spectra of common fibres are presented for comparison.

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“…Lower amounts of SO 2 and higher amounts of CO and other products at the low fluence (Table 1) not only indicates that the CO channel is favoured at the low fluence, but that the phenylene fragmentation occurs together with the CO elimination. The carbon disulfide formation likely occurs through reactions between S atoms extruded from the C-S-C bridges [38] and unsaturated carbon fragments arising from phenylene decomposition.…”

Section: Mechanism Of Degradationmentioning

confidence: 99%