Method and related arrangement for devulcanization of vulcanized rubber
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jan 1, 2015
app pub date -
Jun 28, 2013
filing date -
Jun 28, 2013
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Abstract
A method for devulcanization of rubber feedstock and a related arrangement are provided. The method includes doping rubber feedstock with a photoactive substance (104, 110), configured to activate upon exposure thereof to external radiation of a predetermined wavelength; and further exposing cured rubber feedstock to the external radiation of the predetermined wavelength. Radiation exposure results, upon photoactive substance activation, in initiation of selective scission of intermolecular crosslinks, such as sulfur crosslinks, in the vulcanized rubber elastomers. The photoactive substance may be configured to initiate an excitation emission response and/or chemical reaction. The photoactive substance is preferably selected from semiconducting nanocrystals, such as quantum dots. An arrangement for carrying out the method is presented.
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