Modification of asphalt binder by the blend of chemically grafted thermoplastics and SBS: Influence of blend composition, chemical grafting, sulphur content, and MFI value
| Autor: | Akanksha Pandey, Sham Ravindranath, Alok Sharma |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics chemistry.chemical_element General Chemistry Polymer Polyethylene Condensed Matter Physics Grafting Sulfur chemistry.chemical_compound chemistry Asphalt Phase (matter) Materials Chemistry Composite material Thermoplastic elastomer Melt flow index |
| Zdroj: | Polymer Bulletin. 79:7753-7774 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/s00289-021-03868-7 |
| Popis: | Thermoplastic elastomers, such as styrene–butadiene–styrene (SBS), significantly enhance the properties of asphalt binders. This study first highlights the drawbacks of binder modification using chemically grafted polyethylene (g-PE) and then demonstrates the process by which g-PE can be used in combination with SBS. The important role of chemical grafting, sulphur content, and melt flow index (MFI) value in obtaining practically usable ‘g-PE/SBS’ modified binders have been illustrated. The results show that ungrafted and g-PE produces modified binders with highly inferior properties, and the polymers phase separate from the binder within few hours of preparation. % Elastic recovery of the ungrafted and g-PE modified binders was 2 are the essential factors that resulted in acceptable ‘25/75’ g-PE/SBS modified binders. Cost analysis shows that the use of g-PE can reduce the overall cost of asphalt pavement. The strategy illustrated in this study can be adopted for low-cost polymers and the effective utilization of waste plastics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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