The degradation of polysulphone

Levantovskaya, I.I.; Dralyuk, G.V.; Yurkova, I.A.; Akutin, M.S.; Kovarskaya, B.M.

doi:10.1016/0032-3950(71)90210-3

Cited by 16 publications

(4 citation statements)

References 4 publications

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“…SO 2 was the dominating pyrolysate in PES pyrolysis, but it was not accompanied by a sulfonic acid derivative. This result indicates main chain scission of sulfone linkages as the primary mechanism of pyrolysis, which had been reported earlier 1–7. In Figure 2a, SO 2 started to form at 440 °C, maintained slow evolution between 440 and 530 °C, then quickly reached a maximum at ∼560 °C, and drastically reduced after 580 °C.…”

Section: Resultssupporting

confidence: 82%

“…Davies6 applied Py‐MS to determine the kinetic parameters through the change of SO 2 evolution. Levantovskaya et al7 studied the isothermal pyrolysis of PSF in vacuum to evaluate mechanism and kinetic parameters through SO 2 evolution, mainly from scission of the sulfone linkage. However, the relationships between mechanisms and kinetics of poly(arylene sulfone)s pyrolysis are not fully clear because of the complexity of the pyrogram.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of thermal degradation characteristics of poly(arylene sulfone)s using thermogravimetric analysis/mass spectrometry

Perng

2001

J of Applied Polymer Sci

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Thermal degradation of poly(arylene sulfone)s had been studied by the combination of thermogravimetric analysis/mass spectrometry (TG/MS) with pyrolysis/ gas chromatography/mass spectrometry (Py-GC/MS) techniques. Through these two methods, the pyrolysates from poly(ether sulfone) (PES) and polysulfone (PSF) were identified in 11 and 21 sets of evolution curves, respectively, from room temperature to 900°C. Among these pyrolysates, 12 products from PES and 25 products from PSF were obtained. The major mechanism for both PES and PSF was one-stage pyrolysis involving main chain random scission and carbonization with evolution of SO 2 and phenol as major products. Although the initial thermal stability of PES was lower than that of PSF, the formation of sulfide groups in the condensed phase from PES, through reduction of sulfone group by hydrogen radicals, increased the fire retardation behavior of PES. In PES, the ether and sulfone groups showed similar thermal stability. The thermal stability of functional groups in PSF were in the order of sulfone Ͻ ether Ͻ isopropylidene group. The scission of the ether group in PSF, with evolution of phenol as the major product, reached maximum evolution amount at the temperature of the maximum thermogravimetry loss of TG (T max ). The scission of isopropylidene groups at high temperature (Ͼ580°C) evolved higher mass derivatives that lower the fire retardancy of PSF. By using a simplified kinetic model, PES showed maximum activation energy with a conversion ratio of 0.2-0.3, which implies a high fire retardant effect of sulfide formation in PES. A comparative study with the proposed model and experimental data showed the theoretical pyrolysis curves to be in agreement with the experimental curves for PES and PSF pyrolysis, respectively.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Comparison of thermal degradation characteristics of poly(arylene sulfone)s using thermogravimetric analysis/mass spectrometry

Perng

2001

J of Applied Polymer Sci

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“…Scission of the thermally labile isopropylidene link itself was also proposed. Levantovskaya et al (1971) explained the formation of gaseous products from polysulfone through scission reactions leading to phenyl radicals that were subsequently capped via hydrogen abstraction. Pathways leading to an increase in molecular weight or viscosity were not advanced.…”

Section: Introductionmentioning

confidence: 99%

Chemical Modeling Analysis of Poly(aryl ether sulfone) Thermal Stability through Computer-Generated Reaction Mechanisms

Broadbelt

LaMarca

Klein

et al. 1995

Ind. Eng. Chem. Res.

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“…This bridge is more thermally unstable than, e.g., phenyl-phenyl or ether linkages, 37-39 also in the presence of water. 40 Our results suggested that the osSPAES copolymers degraded primarily through cleavage of the sulfone bridges (Fig. 11c).…”

Section: Membrane Degradationmentioning

confidence: 63%

Properties and degradation of hydrocarbon fuel cell membranes: a comparative study of sulfonated poly(arylene ether sulfone)s with different positions of the acid groups

Takamuku

Jannasch

2012

Polym. Chem.

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The degradation of polysulphone

Cited by 16 publications

References 4 publications

Comparison of thermal degradation characteristics of poly(arylene sulfone)s using thermogravimetric analysis/mass spectrometry

Comparison of thermal degradation characteristics of poly(arylene sulfone)s using thermogravimetric analysis/mass spectrometry

Chemical Modeling Analysis of Poly(aryl ether sulfone) Thermal Stability through Computer-Generated Reaction Mechanisms

Properties and degradation of hydrocarbon fuel cell membranes: a comparative study of sulfonated poly(arylene ether sulfone)s with different positions of the acid groups

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