Effectiveness of original additives in waste rubbers for revulcanization after reclamation with a low-temperature mechanochemical devulcanization method
| Autor: | Lianen Qu, Tianchi Chen, Chuansheng Wang, Kuanfa Hao, Wenchao Wang, Haichao Liu, Jingyao Sun, Donghui Ren, Xiurui Guo, Guo Lei, Dejun Lv |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Strategy and Management 05 social sciences Vulcanization 02 engineering and technology Building and Construction High effectiveness Industrial and Manufacturing Engineering law.invention Natural rubber Land reclamation law visual_art Ultimate tensile strength 050501 criminology 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Tread Composite material Waste rubber Curing (chemistry) 0505 law General Environmental Science |
| Zdroj: | Journal of Cleaner Production. 297:126620 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2021.126620 |
| Popis: | The low-temperature mechanochemical devulcanization (LTMD) method can maintain the effectiveness of the original additives in waste rubbers after rubber reclamation. To confirm this discovery, the LTMD method and the traditional high-temperature atmospheric devulcanization (HTAD) method are used to reclaim waste rubber powders. The reclaimed rubbers are mixed with different amounts of additional additives and then revulcanized alone or revulcanized after blending with all-terrain vehicle (ATV) tread rubbers. The properties of the reclaimed rubbers and the revulcanized rubbers are characterized, and the results reveal that the original sulfur agent is inactive in both the LTMD and HTAD processes and that the original curing assistants maintain high effectiveness after the LTMD process but not after the HTAD process. The tensile strength of the revulcanized LTMD-reclaimed rubbers with no additional curing assistants reaches 97% of that of the revulcanized LTMD-reclaimed rubbers with full additional curing assistants, and 30% higher than that of the revulcanized HTAD-reclaimed rubbers with full additional curing assistants. When blended with 40% reclaimed rubber from ATV tread rubber, the tensile strength of the vulcanized LTMD blends with only the sulfur agent reaches 89% of the pristine ATV tread rubber while that of the vulcanized HTAD blends with full additives only reaches 76% of the pristine ATV tread rubber. The LTMD method not only achieves high-value recycling of waste rubbers but also avoids the failure of the original curing assistants in waste rubbers, thereby saving large amounts of materials and showing great application prospects. |
| Databáze: | OpenAIRE |
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