Preprint Review Version 1 This version is not peer-reviewed

Feedstock Recycling of Rubber – A Review on Devulcanization Technologies

Version 1 : Received: 20 January 2020 / Approved: 21 January 2020 / Online: 21 January 2020 (11:13:52 CET)

A peer-reviewed article of this Preprint also exists.

Markl, E.; Lackner, M. Devulcanization Technologies for Recycling of Tire-Derived Rubber: A Review. Materials 2020, 13, 1246. Markl, E.; Lackner, M. Devulcanization Technologies for Recycling of Tire-Derived Rubber: A Review. Materials 2020, 13, 1246.

Journal reference: Materials 2020, 13, 1246
DOI: 10.3390/ma13051246

Abstract

Vulcanized Rubber, as elastomer, is difficult to recycle. Today, the main end of life routes of tyres and other rubber products are landfilling, incineration in e.g. cement plants, and grinding to a fine powder, with huge quantities lacking sustainable recycling of this valuable material. Devulcanization, i.e. the breaking up of sulfur bonds by chemical, thermo-physical or biological means, is a promising route that has been investigated for more than 50 years. This review article presents and update on the state-of-the art in rubber devulcanization. This review article addresses established devulcanization technologies and novel processes described in the scientific and patent literatures. It is expected that the public discussion of environmental impacts of thermoplastics will soon spill over to thermosets and elastomers. Therefore, the industry needs to develop and market solutions proactively. Tyre recycling through devulcanization has a huge lever, since approx. 30 million tons of tyres are discarded annually.

Subject Areas

rubber devulcanisation; rubber devulcanization; sustainability; recycling; twin screw extruder

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