Effect of simulated mechanical recycling processes on the structure and properties of poly(lactic acid)
| Autor: | J. Martínez Urreaga, Freddys R. Beltrán, M.U. de la Orden, Vicente Lorenzo, J. Acosta |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Materials science Polymers Intrinsic viscosity Polyesters 02 engineering and technology Management Monitoring Policy and Law 010402 general chemistry 01 natural sciences Viscosity Crystallinity chemistry.chemical_compound stomatognathic system Forensic engineering Recycling Lactic Acid Waste Management and Disposal chemistry.chemical_classification Física de materiales technology industry and agriculture Química orgánica General Medicine Polymer Química respiratory system 021001 nanoscience & nanotechnology 0104 chemical sciences Lactic acid Chemical engineering chemistry Gas barrier Degradation (geology) lipids (amino acids peptides and proteins) 0210 nano-technology Residuos Mecánica |
| Zdroj: | Journal of Environmental Management, ISSN 0301-4797, 2018-06-15, Vol. 216 Archivo Digital UPM Universidad Politécnica de Madrid E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid E-Prints Complutense. Archivo Institucional de la UCM instname |
| Popis: | The aim of this work is to study the effects of different simulated mechanical recycling processes on the structure and properties of PLA. A commercial grade of PLA was melt compounded and compression molded, then subjected to two different recycling processes. The first recycling process consisted of an accelerated ageing and a second melt processing step, while the other recycling process included an accelerated ageing, a demanding washing process and a second melt processing step. The intrinsic viscosity measurements indicate that both recycling processes produce a degradation in PLA, which is more pronounced in the sample subjected to the washing process. DSC results suggest an increase in the mobility of the polymer chains in the recycled materials; however the degree of crystallinity of PLA seems unchanged. The optical, mechanical and gas barrier properties of PLA do not seem to be largely affected by the degradation suffered during the different recycling processes. These results suggest that, despite the degradation of PLA, the impact of the different simulated mechanical recycling processes on the final properties is limited. Thus, the potential use of recycled PLA in packaging applications is not jeopardized. |
| Databáze: | OpenAIRE |
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