Kinetic Modelling of the catalytic oxidation of 2-(methylmercapto)-benzothiazole under mild conditions

Córdoba, Agostina; Saux, Clara; Pierella, Liliana B.

doi:10.1016/j.apcata.2017.07.001

Cited by 3 publications

(1 citation statement)

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“…Hydrogen peroxide (H 2 O 2 ) is a strong oxidizing agent and can quickly decompose into hydroxyl radicals ( • OH) at low temperatures. , The • OH are highly reactive, which can lead to hydrogen atom abstraction of rubber chains and quench the allylic radicals. Ibrahim et al reported that by using H 2 O 2 and NaNO 2 as the reagents, high molecular weight NR was transformed into liquid NR at 70 °C .…”

Section: Introductionmentioning

confidence: 99%

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

Zhang

Wan

et al. 2021

ACS Sustainable Chem. Eng.

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Recombination reactions often occur in the process of chemical, thermal, or mechanical degradation of vulcanized styrene butadiene rubber (SBR), which hinders the recycling efficiency of waste tire rubbers. In this work, we developed an effective method to transform solid vulcanized SBR into reclaimed rubber with 100% sol fraction through a hydrogen peroxide (H 2 O 2 )-induced thermo-oxidative reclamation process at 100 °C with the assistance of soybean oil. The structural evolution of the vulcanized SBR and the role of H 2 O 2 and soybean oil in the reclaiming process were investigated by sol−gel analysis, gel permeation chromatography (GPC), attenuated total reflectance− Fourier transform infrared spectroscopy (ATR−FTIR), and 13 C nuclear magnetic resonance ( 13 C NMR) spectroscopy. The results showed that vulcanized SBR underwent severe oxidative scission, the sol of the reclaimed samples increased from 20.4 wt % up to 100 wt % with a decreased molecular weight to 1.378 × 10 4 g/mol. Multiple functional groups such as carboxyl, hydroxyl, and ether groups were generated in the polymer chains as confirmed by 13 C NMR and FTIR spectroscopy. Moreover, the reaction pathway of the oxidative reclamation was quantified by density functional theory (DFT) calculations, suggesting that hydroxyl radicals were generated from a homolytic cleavage reaction of H 2 O 2 with SBR by hydrogen abstraction and accelerated the rate-determining step of the SBR oxidation. The apparent activation energy (E a ) of the initial stage of the oxidative reclamation decreased from 223 to 160 kJ/mol according to the model-free kinetics results.

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Section: Introductionmentioning

confidence: 99%

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

Zhang

Wan

et al. 2021

ACS Sustainable Chem. Eng.

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A review of copper-based Fenton reactions for the removal of organic pollutants from wastewater over the last decade: different reaction systems

Du,

Hu,

Huang

et al. 2024

Environ Sci Pollut Res

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Recent advances in Cu-Fenton systems for the treatment of industrial wastewaters: Role of Cu complexes and Cu composites

Pham

Dai

et al. 2020

Journal of Hazardous Materials

152

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Kinetic Modelling of the catalytic oxidation of 2-(methylmercapto)-benzothiazole under mild conditions

Cited by 3 publications

References 48 publications

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

A review of copper-based Fenton reactions for the removal of organic pollutants from wastewater over the last decade: different reaction systems

Recent advances in Cu-Fenton systems for the treatment of industrial wastewaters: Role of Cu complexes and Cu composites

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Kinetic Modelling of the catalytic oxidation of 2-(methylmercapto)-benzothiazole under mild conditions

Cited by 3 publications

References 48 publications

Understanding H2O2-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

Understanding H2O2-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

A review of copper-based Fenton reactions for the removal of organic pollutants from wastewater over the last decade: different reaction systems

Recent advances in Cu-Fenton systems for the treatment of industrial wastewaters: Role of Cu complexes and Cu composites

Contact Info

Product

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About

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures

Understanding H₂O₂-Induced Thermo-Oxidative Reclamation of Vulcanized Styrene Butadiene Rubber at Low Temperatures