Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times
Microwave devulcanization is known to be a promising and an efficient rubber recycling method which makes possible for the rubber to regain its fluidity, and makes it capable of being remolded and revulcanized. The focus of this work is to understand the physical and chemical changes that occur in t...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2015-11-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0006234&mi=cd |
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| author | P. S. Garcia F. D. B. de Sousa J. A. de Lima S. A. Cruz C. H. Scuracchio |
| author_facet | P. S. Garcia F. D. B. de Sousa J. A. de Lima S. A. Cruz C. H. Scuracchio |
| author_sort | P. S. Garcia |
| collection | DOAJ |
| description | Microwave devulcanization is known to be a promising and an efficient rubber recycling method which makes possible for the rubber to regain its fluidity, and makes it capable of being remolded and revulcanized. The focus of this work is to understand the physical and chemical changes that occur in the ground tire rubber after different microwave exposure periods. For this purpose chemical, thermal, rheological and morphological analyses were performed on the tire rubber, which contains natural rubber (NR) and styrene-butadiene rubber (SBR) as polymeric material. The results showed that the microwave treatment promoted the breaking of sulfur cross-links and consequently increased the rubber fluidity. However, long periods of exposure led to degradation and modification of some properties. At nanoscale, the deformation of the devulcanized NR domain under stress was observed, and the morphology obtained appears to be a droplet dispersion morphology. The most exposed samples presented only one glass transition temperature, and from this it was concluded that the treatment may have played an important role in the compatibilization of the elastomeric blend. Based on the results, it is required to control the microwave exposure time and polymeric degradation in order to achieve a regenerated rubber with satisfactory properties. |
| format | Article |
| id | doaj-art-50e3056f34294fa98d21b94b802e9367 |
| institution | DOAJ |
| issn | 1788-618X |
| language | English |
| publishDate | 2015-11-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-50e3056f34294fa98d21b94b802e93672025-08-20T02:52:41ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2015-11-019111015102610.3144/expresspolymlett.2015.91Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure timesP. S. GarciaF. D. B. de SousaJ. A. de LimaS. A. CruzC. H. ScuracchioMicrowave devulcanization is known to be a promising and an efficient rubber recycling method which makes possible for the rubber to regain its fluidity, and makes it capable of being remolded and revulcanized. The focus of this work is to understand the physical and chemical changes that occur in the ground tire rubber after different microwave exposure periods. For this purpose chemical, thermal, rheological and morphological analyses were performed on the tire rubber, which contains natural rubber (NR) and styrene-butadiene rubber (SBR) as polymeric material. The results showed that the microwave treatment promoted the breaking of sulfur cross-links and consequently increased the rubber fluidity. However, long periods of exposure led to degradation and modification of some properties. At nanoscale, the deformation of the devulcanized NR domain under stress was observed, and the morphology obtained appears to be a droplet dispersion morphology. The most exposed samples presented only one glass transition temperature, and from this it was concluded that the treatment may have played an important role in the compatibilization of the elastomeric blend. Based on the results, it is required to control the microwave exposure time and polymeric degradation in order to achieve a regenerated rubber with satisfactory properties.http://www.expresspolymlett.com/letolt.php?file=EPL-0006234&mi=cdRecyclingground tire rubberdevulcanizationmicrowavesdegradation |
| spellingShingle | P. S. Garcia F. D. B. de Sousa J. A. de Lima S. A. Cruz C. H. Scuracchio Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times eXPRESS Polymer Letters Recycling ground tire rubber devulcanization microwaves degradation |
| title | Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times |
| title_full | Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times |
| title_fullStr | Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times |
| title_full_unstemmed | Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times |
| title_short | Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times |
| title_sort | devulcanization of ground tire rubber physical and chemical changes after different microwave exposure times |
| topic | Recycling ground tire rubber devulcanization microwaves degradation |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0006234&mi=cd |
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