Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding
A major challenge in waste rubber (WR) industry is achieving a high sol fraction and high molecular weight of recycled rubber at the same time. Herein, the WR from the shoe industry was thermo-mechanically ground via the torque rheometer. The effect of grinding temperature and filling rate were syst...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/5/1057 |
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| author | Qiao Xiao Changlin Cao Liren Xiao Longshan Bai Huibin Cheng Dandan Lei Xiaoli Sun Lingxing Zeng Baoquan Huang Qingrong Qian Qinghua Chen |
| author_facet | Qiao Xiao Changlin Cao Liren Xiao Longshan Bai Huibin Cheng Dandan Lei Xiaoli Sun Lingxing Zeng Baoquan Huang Qingrong Qian Qinghua Chen |
| author_sort | Qiao Xiao |
| collection | DOAJ |
| description | A major challenge in waste rubber (WR) industry is achieving a high sol fraction and high molecular weight of recycled rubber at the same time. Herein, the WR from the shoe industry was thermo-mechanically ground via the torque rheometer. The effect of grinding temperature and filling rate were systematically investigated. The particle size distribution, structure evolution, and morphology of the recycled rubber were explored by laser particle size analyzer, Fourier transform infrared spectroscopy (FTIR), sol fraction analysis, gel permeation chromatography (GPC), differential scanning calorimeter (DSC), and scanning electron microscope (SEM). The results indicate that the thermo-mechanical method could reduce the particle size of WR. Moreover, the particle size distribution of WR after being ground can be described by Rosin’s equation. The oxidation reaction occurs during thermal-mechanical grinding. With the increase of the grinding temperature and filling rate, the sol fraction of the recycled WR increases. It is also found that a high sol fraction (43.7%) and high molecular weight (35,284 g/mol) of reclaimed rubber could be achieved at 80 °C with a filling rate of 85%. Moreover, the obtained recycled rubber compound with SBR show a similar vulcanization characteristics to pure SBR. Our selective decomposition of waste rubber strategy opens up a new way for upgrading WR in shoe industry. |
| first_indexed | 2024-03-09T20:24:14Z |
| format | Article |
| id | doaj.art-589d686cd3f34d3c8abaa128f42796c9 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T20:24:14Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-589d686cd3f34d3c8abaa128f42796c92023-11-23T23:40:29ZengMDPI AGPolymers2073-43602022-03-01145105710.3390/polym14051057Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical GrindingQiao Xiao0Changlin Cao1Liren Xiao2Longshan Bai3Huibin Cheng4Dandan Lei5Xiaoli Sun6Lingxing Zeng7Baoquan Huang8Qingrong Qian9Qinghua Chen10College of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaCollege of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, ChinaCollege of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaCollege of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaEngineering Research Center of Polymer Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, ChinaA major challenge in waste rubber (WR) industry is achieving a high sol fraction and high molecular weight of recycled rubber at the same time. Herein, the WR from the shoe industry was thermo-mechanically ground via the torque rheometer. The effect of grinding temperature and filling rate were systematically investigated. The particle size distribution, structure evolution, and morphology of the recycled rubber were explored by laser particle size analyzer, Fourier transform infrared spectroscopy (FTIR), sol fraction analysis, gel permeation chromatography (GPC), differential scanning calorimeter (DSC), and scanning electron microscope (SEM). The results indicate that the thermo-mechanical method could reduce the particle size of WR. Moreover, the particle size distribution of WR after being ground can be described by Rosin’s equation. The oxidation reaction occurs during thermal-mechanical grinding. With the increase of the grinding temperature and filling rate, the sol fraction of the recycled WR increases. It is also found that a high sol fraction (43.7%) and high molecular weight (35,284 g/mol) of reclaimed rubber could be achieved at 80 °C with a filling rate of 85%. Moreover, the obtained recycled rubber compound with SBR show a similar vulcanization characteristics to pure SBR. Our selective decomposition of waste rubber strategy opens up a new way for upgrading WR in shoe industry.https://www.mdpi.com/2073-4360/14/5/1057waste rubberthermo-mechanical grindingfilling ratesgrinding temperature |
| spellingShingle | Qiao Xiao Changlin Cao Liren Xiao Longshan Bai Huibin Cheng Dandan Lei Xiaoli Sun Lingxing Zeng Baoquan Huang Qingrong Qian Qinghua Chen Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding Polymers waste rubber thermo-mechanical grinding filling rates grinding temperature |
| title | Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding |
| title_full | Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding |
| title_fullStr | Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding |
| title_full_unstemmed | Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding |
| title_short | Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding |
| title_sort | selective decomposition of waste rubber from the shoe industry by the combination of thermal process and mechanical grinding |
| topic | waste rubber thermo-mechanical grinding filling rates grinding temperature |
| url | https://www.mdpi.com/2073-4360/14/5/1057 |
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