EcoBlends'up: compuestos de PLA/BioPA, microfibrilados
| Autor: | Martínez Orozco, Leandro Isidro, León Albiter, Noel, Cailloux, Jonathan, Sánchez Soto, Miguel, Maspoch Rulduà, Mª Lluïsa, Santana Pérez, Orlando Onofre |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Universitat Politècnica de Catalunya. e-PLASCOM - Plàstics i Compòsits Ecològics |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| DOI: | 10.1016/j.tafmec.2022.103255 |
| Popis: | In certain polymer blends, a properly oriented microfibrillar morphology of the dispersed phase during the processing stage can generate a reinforcing effect by increasing the fracture toughness, especially in the crack propagation stage. These types of materials are called “in situ” microfibrillated composites (MFCs). Its obtention is conditioned by the rheological properties of the blend and the parameters of the forming process. In this context, additive manufacturing is of interest, specially fused filament fabrication (FFF) by pellets supply instead of extruded filaments. In this work, the study of the feasibility of manufacturing MFCs is proposed by inducing the microfibrillation of a BioPA in the PLA/BioPA “ecoblends”. The optimal processing conditions of the FFF process for the generation of MFCs are evaluated, as well as the uniaxial tensile behavior and the fracture behavior of the manufactured SENB test specimens, employing instrumented impact technique. The evidence obtained shows that the use of a rheologically modified PLA matrix by reactive extrusion (PLAREX) promotes the obtention of MFCs with a better balance of mechanical properties in terms of elastic modulus (E) and ductility and an improvement in apparent toughness and resistance to crack propagation of the fabricated part. |
| Databáze: | OpenAIRE |
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