Chemical recycling of sulfur-cured natural rubber using supercritical carbon dioxide

Kojima, Masayasu; Tosaka, Masatoshi; Ikeda, Yuko

doi:10.1039/b314137c

Cited by 70 publications

(48 citation statements)

References 20 publications

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“…This is described extensively in the literature on rubber compounding for commercial and tire use. The sulfurcrosslinking of natural rubber, as usually used for tires, can be swollen in SCCO2 with crosslinking density around 10 44 . With the organic peroxide compound used for the crosslinking reaction, the shorter chain length between crosslinked branchs than the sulfur will make the rubber less elastic, which will be better for SCCO2 resistance 45 .…”

Section: Methodsmentioning

confidence: 99%

Development of Protective Coatings for Co-Sequestration Processes and Pipelines

Bierwagen¹,

Huang²

2011

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Section: Methodsmentioning

confidence: 99%

Development of Protective Coatings for Co-Sequestration Processes and Pipelines

Bierwagen¹,

Huang²

2011

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“…6. 64 In other investigations, 65,66 diphenyl disulfide (DD) as reclaiming agent was dissolved in scCO 2 (supercritical CO 2 ) and the DD molecules solvated by the scCO 2 penetration into the rubber vulcanizate. The presence of DD in the rubber vulcanizate led to the crosslink cleavage as shown in Fig.…”

Section: (A)mentioning

confidence: 99%

Review of the Reclaiming of Rubber Waste and Recent Work on the Recycling of Ethylene–propylene–diene Rubber Waste

Movahed

Ansarifar

Estagy

2016

Rubber Chemistry and Technology

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Rubbers do not decompose easily and therefore disposal of rubber waste is a serious environmental concern. Raw material costs, diminishing natural resources, and the growing awareness of environmental issues and sustainability have made rubber recycling a major area of concern. Reclaiming and recycling rubber waste is a major scientific and technological challenge facing rubber scientists today. This paper reviews a number of important areas related to the reclaiming, characterizing, testing and recycling of rubber waste. These include: chemical and microbial devulcanization with particular emphasis on main chain scission and kinetics of chemical devulcanization reactions; the cutting-edge techniques for reclaiming devulcanized rubber waste by the action of large shearing forces, heat and chemical agents: and analytical techniques and methods for characterizing composition and testing of devulcanized rubber waste, respectively. In addition, some aspects of the recycling of devulcanized ethylene-propylenediene rubber (EPDM) waste will be reported. EPDM is used extensively in automotive components world-wide and recycling the rubber at the end of its useful service life is of major importance to manufacturers of automotive components.

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“…Kojima et al [68][69][70] decrosslinked a sulfur-cured natural rubber by using diphenyl disulfide in supercritical CO 2 (Scheme 17). The diphenyl disulfide as the devulcanizing reagent fractionated the vulcanized rubber into a sol component having high molecular weight.…”

Section: Materials and Technologies For Polymer Recycling H Nishidamentioning

confidence: 99%

Development of materials and technologies for control of polymer recycling

Nishida

2011

Polym J

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The movement toward a recycling-based society through the essential development of recyclable materials alongside technologies for controlling recycling is reviewed. Recently, there has been progress in producing various polymers and technologies with the aim of achieving circulative utilization. For example, the upgrade recycling of commodity plastics, selective transformation of engineering plastics, selective depolymerization of various polymers in supercritical fluids, crosslinking-decrosslinking control using reversible reactions and developments in biomass-based recyclable polymers. Despite great strides taken in the effectiveness, efficiency and precision of these polymers and technologies, further improvements will be required to meet the practical requirements of a responsible sustainable system for the recycling of containers, packages, electric household appliances and end-of-life vehicles all of which are operated in compliance with the recycling laws of Japan.

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Chemical recycling of sulfur-cured natural rubber using supercritical carbon dioxide

Cited by 70 publications

References 20 publications

Development of Protective Coatings for Co-Sequestration Processes and Pipelines

Development of Protective Coatings for Co-Sequestration Processes and Pipelines

Review of the Reclaiming of Rubber Waste and Recent Work on the Recycling of Ethylene–propylene–diene Rubber Waste

Development of materials and technologies for control of polymer recycling

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