Scrap tyre rubber depolymerization by nitrous oxide: products and mechanism of reaction

Дубков, К. А.; Семиколенов, С. В.; Иванов, Д. П.; Babushkin, Dmitrii E.; Voronchikhin, V. D.

doi:10.1007/s13726-014-0284-1

Cited by 17 publications

(7 citation statements)

References 25 publications

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“…The axial vibration attributed to monosulfidic and polysulfidic bonds can be observed in the region of 800–600 cm –1 . The peaks at 1000–800 cm –1 are related to CC bonds from butadiene present in the SBR and in the NR, ,− and the one at 960 cm –1 is attributed to the trans −HCCH– groups vibrations of butadiene present in the SBR . Also, according to Shi et al., the peaks around 832 cm –1 are assigned to δCH bending, and from 2969–2849 cm –1 for γC–H saturated stretching, all them typical of NR …”

Section: Resultsmentioning

confidence: 90%

From Devulcanization to Revulcanization: Challenges in Getting Recycled Tire Rubber for Technical Applications

Sousa

Zanchet

Scuracchio

2019

ACS Sustainable Chem. Eng.

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For a sustainable development, recycling is a very important step, which, beyond saving the use of natural resources, can also be a solution for low-income families, providing them earnings. Recycling is also considered a category of green chemistry and contributes to the reduction of pollution, bringing the improvement to the public health. However, recycling of a material trying to contribute to the environment will not bring positive results if the final properties of the recycled material do not point to an application that is viable. In this sense, the aim of this work is to present a comprehensive study of the revulcanized ground tire rubber samples, previously devulcanized by the action of the microwaves under different exposure times. It is extremely important to know in depth the modifications that occurred in the recycled material during all the stages of the recycling process to which the material was subjected, in order to select the ideal application for the recycled material. The obtained results pointed out to modifications as a result of the revulcanization process, such as in the chemical structure, composition, thermal stability, and morphology.

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Section: Resultsmentioning

confidence: 90%

From Devulcanization to Revulcanization: Challenges in Getting Recycled Tire Rubber for Technical Applications

Sousa

Zanchet

Scuracchio

2019

ACS Sustainable Chem. Eng.

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“…According to Dubkov et al [5], around 30% of a tire is composed of carbon black, which corresponds to around 40 phr of carbon black in the tire. Since carbon black is preferably in the NR phase, its content would be enough to devulcanize the sample, considering the fact that the minimum carbon black for improving the devulcanization process is 45 phr, as mentioned above.…”

Section: -Temperature Measurements After Devulcanization By Microwavesmentioning

confidence: 99%

Devulcanization of waste tire rubber by microwaves

Sousa

Scuracchio

et al. 2017

Polymer Degradation and Stability

144

140

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“…One of the biggest causes of environmental problems in our society is the inadequate disposal of solid residues, such as tires, due to the three-dimensional structure formed by cross-linkings, which have an indefinite time of natural degradation . The tires, in particular, when disposed of in landfills, due to the large volumes occupied, are excellent places for rainwater storage, making them a propitious and ideal place for the proliferation of vectors such as the Aedes aegypti mosquito, a transmitter of dengue, chikungunya, zika, and yellow fever.…”

Section: Introductionmentioning

confidence: 99%

From Devulcanization of Ground Tire Rubber by Microwaves to Revulcanization: A Revulcanization Kinetic Approach Using a Simple Prediction Model

Sousa

Ornaghi

2020

ACS Sustainable Chem. Eng.

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Devulcanization of rubber by microwave energy is an environmentally friendly technique, and it has gained special attention from the recycling field due to several advantages over other methods such as high productivity, uniform heating, and the noninvolvement of chemicals during the process. In this sense, ground tire rubber (GTR) was devulcanized by the action of microwaves at different exposure times. The thermal stability of devulcanized samples and the revulcanization behavior were correlated to structural modifications that occurred during devulcanization. The revulcanization kinetics by Arrhenius parameters was studied aiming at determining the mechanism and model of the reaction, being that it seems to follow an autocatalytic mechanism with a revulcanization model type reagents → products. The optimization of the temperature and time of the revulcanization process was determined based on five initial temperatures. The predicted results were based on previous revulcanization kinetic parameters, and they were physically plausible with the data, mainly within the studied temperature range. A more developed understanding of the chemical structure/reactions is recommended to avoid errors of interpretation out of the studied experimental range. Finally, the obtained results are new, allowing the prediction and optimization of kinetic properties such as the revulcanization process, being essential to the development of microwave devulcanization as a truly sustainable recycling process.

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Scrap tyre rubber depolymerization by nitrous oxide: products and mechanism of reaction

Cited by 17 publications

References 25 publications

From Devulcanization to Revulcanization: Challenges in Getting Recycled Tire Rubber for Technical Applications

From Devulcanization to Revulcanization: Challenges in Getting Recycled Tire Rubber for Technical Applications

Devulcanization of waste tire rubber by microwaves

From Devulcanization of Ground Tire Rubber by Microwaves to Revulcanization: A Revulcanization Kinetic Approach Using a Simple Prediction Model

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