Mechanical properties and biodegradability of flax fiber-reinforced composite of polylactide and polycaprolactone
| Autor: | Marian Zenkiewicz, Magdalena Stepczyńska, Krzysztof Moraczewski, Piotr Rytlewski, Rafał Malinowski, Bartłomiej Jagodziński |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Composite number Izod impact strength test 02 engineering and technology Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Differential scanning calorimetry chemistry Ultimate tensile strength Polycaprolactone Materials Chemistry Extrusion Fiber Composite material 0210 nano-technology |
| Zdroj: | Polimery. 63:603-610 |
| ISSN: | 0032-2725 |
| DOI: | 10.14314/polimery.2018.9.4 |
| Popis: | The aim of this work was to produce a composite based on the blend of polylactide and polycaprolactone and reinforced with flax fiber, intended for processing by injection molding, with improved mechanical and biodegradation properties as compared to neat polylactide (PLA) and polycaprolactone (PCL). The material was prepared by mixing PLA, PCL and flax fibers (about 5 mm long), extrusion and granulation with subsequent injection molding to obtain test samples. The composites differed in the content of PCL (0, 5, 10, 15 and 30 wt %) whereas the content of flax fibers was kept constant (20 wt %). The samples were characterized by means of scanning electron microscopy (SEM), tensile and impact strength measurements, differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Biodegradation studies were carried out using proteinase K at laboratory conditions. It was found that a reduction of fiber lengths took place during the extrusion process and that addition of flax fibers to PLA/PCL blend resulted in an increase in elastic modulus and biodegradation rate. The composite impact strength was significantly improved at 30 wt % PCL fraction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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