Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers
In this work, ground tire rubber (GTR) was thermo-mechanically treated in the presence of styrene-butadiene-styrene (SBS) copolymers. During preliminary investigation, the effects of different SBS copolymer grades, the variable content of SBS copolymer on the Mooney viscosity, and the thermal and me...
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MDPI AG
2023-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/5/1788 |
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| author | Agnieszka Susik Agata Rodak Javier Cañavate Xavier Colom Shifeng Wang Krzysztof Formela |
| author_facet | Agnieszka Susik Agata Rodak Javier Cañavate Xavier Colom Shifeng Wang Krzysztof Formela |
| author_sort | Agnieszka Susik |
| collection | DOAJ |
| description | In this work, ground tire rubber (GTR) was thermo-mechanically treated in the presence of styrene-butadiene-styrene (SBS) copolymers. During preliminary investigation, the effects of different SBS copolymer grades, the variable content of SBS copolymer on the Mooney viscosity, and the thermal and mechanical properties of modified GTR were determined. Subsequently, GTR modified by SBS copolymer and cross-linking agents (sulfur-based system and dicumyl peroxide) was characterized by assessment of rheological, physico-mechanical, and morphological properties. Rheological investigations showed that linear SBS copolymer, with the highest melt flow rate among studied SBS grades, was the most promising modifier of GTR, considering processing behavior. It was also observed that an SBS improves the thermal stability of the modified GTR. However, it was found that higher content of SBS copolymer (above 30 wt%) does not bring any effective changes and, for economic reasons, is inefficient. The results showed that samples based on GTR modified by SBS and dicumyl peroxide have better processability and slightly higher mechanical properties compared to samples cross-linked by a sulfur-based system. This is due to the affinity of dicumyl peroxide to the co-cross-linking of GTR and SBS phases. |
| first_indexed | 2024-03-11T07:19:34Z |
| format | Article |
| id | doaj.art-6200e7ecc4564c269111e47f0a9de27c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T07:19:34Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6200e7ecc4564c269111e47f0a9de27c2023-11-17T08:02:55ZengMDPI AGMaterials1996-19442023-02-01165178810.3390/ma16051788Processing, Mechanical and Morphological Properties of GTR Modified by SBS CopolymersAgnieszka Susik0Agata Rodak1Javier Cañavate2Xavier Colom3Shifeng Wang4Krzysztof Formela5Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, PolandDepartment of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, PolandDepartment of Chemical Engineering, Universitat Politècnica de Catalunya Barcelona Tech, Colom 1, Terrassa, 08222 Barcelona, SpainDepartment of Chemical Engineering, Universitat Politècnica de Catalunya Barcelona Tech, Colom 1, Terrassa, 08222 Barcelona, SpainDepartment of Polymer Science and Engineering, Shanghai State Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, ChinaDepartment of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, PolandIn this work, ground tire rubber (GTR) was thermo-mechanically treated in the presence of styrene-butadiene-styrene (SBS) copolymers. During preliminary investigation, the effects of different SBS copolymer grades, the variable content of SBS copolymer on the Mooney viscosity, and the thermal and mechanical properties of modified GTR were determined. Subsequently, GTR modified by SBS copolymer and cross-linking agents (sulfur-based system and dicumyl peroxide) was characterized by assessment of rheological, physico-mechanical, and morphological properties. Rheological investigations showed that linear SBS copolymer, with the highest melt flow rate among studied SBS grades, was the most promising modifier of GTR, considering processing behavior. It was also observed that an SBS improves the thermal stability of the modified GTR. However, it was found that higher content of SBS copolymer (above 30 wt%) does not bring any effective changes and, for economic reasons, is inefficient. The results showed that samples based on GTR modified by SBS and dicumyl peroxide have better processability and slightly higher mechanical properties compared to samples cross-linked by a sulfur-based system. This is due to the affinity of dicumyl peroxide to the co-cross-linking of GTR and SBS phases.https://www.mdpi.com/1996-1944/16/5/1788ground tire rubberSBS copolymersmodificationmelt-blendingrecycling |
| spellingShingle | Agnieszka Susik Agata Rodak Javier Cañavate Xavier Colom Shifeng Wang Krzysztof Formela Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers Materials ground tire rubber SBS copolymers modification melt-blending recycling |
| title | Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers |
| title_full | Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers |
| title_fullStr | Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers |
| title_full_unstemmed | Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers |
| title_short | Processing, Mechanical and Morphological Properties of GTR Modified by SBS Copolymers |
| title_sort | processing mechanical and morphological properties of gtr modified by sbs copolymers |
| topic | ground tire rubber SBS copolymers modification melt-blending recycling |
| url | https://www.mdpi.com/1996-1944/16/5/1788 |
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