Identification of volatile butyl rubber thermal-oxidative degradation products by cryofocusing gas chromatography/mass spectrometry (cryo-GC/MS).

Smith, Jonell Nicole; White, Michael Irvin; Bernstein, Robert; Hochrein, James Michael

doi:10.2172/1093689

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…IIR has been systematically investigated since invented, including identification, analysis, characterization, structural features, and degradation. Degradation behaviors of IIR have been studied under various conditions: thermal, thermo‐oxidative, photooxidative, radiochemical, and so on . Dubey et al investigated the pyrolysis process of IIR under inert atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation and pyrolysis study of brominated butyl rubber‐based damping material

Chen

Peng

Yuan

et al. 2019

Polymers for Advanced Techs

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This paper deals with the thermal stability and decomposition behavior of brominated butyl rubber-based damping material (BRP). The raw materials, butyl rubber matrix (IIR) and brominated phenolic resin (PF), were also investigated as control. IIR shows one decomposition stage, while PF shows four weight loss stages. Flynn-Wall-Ozawa calculation indicates that BRP has thermal stability between IIR and PF. Thermogravimetric analysis-Fourier transform infrared (TGA-FTIR) and pyrolysis-gas chromatography/mass spectrometry (GC/MS) were used to investigate the volatile products under nitrogen atmosphere. As expected, BRP shows combined thermal decomposition behavior of both IIR and PF. The degradation mechanism of BRP was proposed, which is not significantly influenced by the incorporation of PF. The application stability of BRP is worth to be noticed since the post-cure effect, that is, the free radicals remained from vulcanization would cause additional crosslinking when stored at 80 C to 120 C. K E Y W O R D Sbutyl rubber, mechanism, pyrolysis, thermal stability

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Section: Introductionmentioning

confidence: 99%

Thermal degradation and pyrolysis study of brominated butyl rubber‐based damping material

Chen

Peng

Yuan

et al. 2019

Polymers for Advanced Techs

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Heat Aging of a Bromobutyl Tire Inner Liner Under Aerobic and Anaerobic Conditions

Yerxa¹,

Porter²,

Pazur³

2021

Rubber Chemistry and Technology

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A bromobutyl tire inner liner compound was prepared and subjected to aerobic and anaerobic heat aging at a temperature of 100 °C for seven aging times up to 8 weeks. Hardness and mechanical properties were monitored, and the evolution of the crosslink density was followed using equilibrium solvent swell and low field double quantum (DQ) nuclear magnetic resonance (NMR). The hardness and the 300% tensile stress increased with heat aging, while both tensile strength and elongation at break dropped. Both chain scission and crosslinking reactions were taking place. Equilibrium swelling and DQ NMR results confirmed that a larger crosslink density increase was seen under aerobic versus anaerobic aging conditions. The network distribution consisting of a dominant low crosslinking zone and small areas of higher crosslinking slowly broadened and shifted toward higher crosslink densities upon heat aging. The compounds aged heterogeneously. Attenuated total reflectance–Fourier transform infrared spectroscopy confirmed the presence of an oxidized surface layer, and therefore diffusion-limited oxidation effects, but only under aerobic aging conditions. Reaction mechanisms are proposed to explain the net crosslink rise with heat aging.

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Identification of volatile butyl rubber thermal-oxidative degradation products by cryofocusing gas chromatography/mass spectrometry (cryo-GC/MS).

Cited by 2 publications

References 16 publications

Thermal degradation and pyrolysis study of brominated butyl rubber‐based damping material

Thermal degradation and pyrolysis study of brominated butyl rubber‐based damping material

Heat Aging of a Bromobutyl Tire Inner Liner Under Aerobic and Anaerobic Conditions

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