New tartrate and alpha-tocopherol based environmentally friendly plasticizers for improvement of the ductility of polylactic acid
[EN] This study focuses on developing environmentally friendly plasticized poly(lactide) (PLA) formulations using tartaric acid and ¿-tocopherol at 20 wt%. The extrusion and injection molding processes demonstrated the industrial applicability of these plasticizers. Mechanical tests revealed positiv...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/220063 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/220063 |
| Access Level: | acceso abierto |
| Palabra clave: | Plasticization Polylactic acid Mechanical properties Tartrate Alpha-tocopherol 13.- Tomar medidas urgentes para combatir el cambio climático y sus efectos 14.- Conservar y utilizar de forma sostenible los océanos, mares y recursos marinos para lograr el desarrollo sostenible |
| Sumario: | [EN] This study focuses on developing environmentally friendly plasticized poly(lactide) (PLA) formulations using tartaric acid and ¿-tocopherol at 20 wt%. The extrusion and injection molding processes demonstrated the industrial applicability of these plasticizers. Mechanical tests revealed positive results for tartrate-based plasticizers, with elongation at break surpassing 220 %, while ¿-tocopherol succinate achieved 170 %. However, ¿-tocopherol acetate showed limited PLA plasticization. Field emission scanning electron microscopy confirmed plasticization in fractured surfaces. Thermal analysis indicated a reduction in PLA's glass transition temperature (Tg) from 60 °C to around 30 °C with these plasticizers, underscoring tartrates' exceptional efficiency. The cold crystallization temperature (Tcc) decreased for all plasticized samples due to enhanced chain mobility. Thermomechanical analysis revealed dimensional shrinkage, with dimethyl tartrate (DMT) causing less pronounced effects. Generally, tartrates yielded formulations with superior properties, attributed to their lower molecular weight compared to ¿-tocopherol-derived plasticizers. Notably, all plasticizers employed are an eco-friendly approach to improve PLA's processability and enhancing ductile properties. |
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