https://www.socictopen.socict.org/files/original/fedf4233460f48ed052fa4896b172c1f.pdf ca537554128590ed32d404f0532a0ef1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Reciclaje de Poliestireno Expandido por el Método de Disolución Precipitación Creator An entity primarily responsible for making the resource Miguel Aldás, Francisco Javier Quiroz, Paola Saltos, José Iván Chango Description An account of the resource Resumen: En el presente proyecto se estudió el proceso de reciclaje de poliestireno expandido (EPS) por el método de disolución – precipitación, como alternativa para minimizar el impacto ambiental posconsumo. Se desarrolló el reciclaje de empaques de EPS de electrodomésticos variando las condiciones del método con el fin de recuperar poliestireno. Los residuos de EPS recolectados y fragmentados, se disolvieron en tetrahidrofurano (THF) y se precipitaron  con etilenglicol (EG), bajo agitación mecánica continua. El polímero precipitado se separó por filtración y posterior secado, molienda y lavado. El producto así tratado se lo caracterizó estructuralmente por espectroscopía infrarroja, térmicamente por calorimetría diferencial de barrido y termogravimetría. Además, se determinó el índice de fluidez para estimar su capacidad de procesamiento. De los ensayos realizados se obtuvieron polímeros estructuralmente semejantes al poliestireno, con un grado de contaminación menor al 1.6 % de agente precipitante, presentan un índice de fluidez entre 15.56 y 23.60 g/10 min por lo que pueden ser reprocesados por inyección y extrusión, la temperatura de transición vítrea y el peso molecular son similares a los residuos de EPS. El ensayo con mejores resultados fue la disolución 30 % EPS y precipitación con una relación volumétrica 1/3 THF/EG, ofreciendo un polímero sin contaminación por el etilenglicol remanente. Abstract: In this project the recycling process of expanded polystyrene (EPS) was studied by the method of dissolution - precipitation, as an alternative to minimize the environmental impact post-consumer. Thus, recycling of EPS packaging was developed varying the conditions of the method in order to recover polystyrene reprocessing. The EPS waste collected and fragmented were dissolved in tetrahydrofuran (THF) and precipitated with ethylene glycol (EG) under continuous mechanical stirring. The precipitate polymer was recovered with filtration, through drying, crushing and washing. The recovered polymers are structural characterized by the infrared spectroscopy, thermal by differential scanning calorimetry and thermogravimetry. Melt flow index was measured in order to estimate its processability. The tests performed indicate that the polymers obtained are structural identical to polystyrene with a lower degree of contamination to 1.6 % of precipitant, they have a melt index between 15.56 and 23.60 g/10 min so can be reprocessed by injection and extrusion, the glass transition temperature and molecular weight are similar to the waste EPS. The best performing test was 30 % EPS solution and precipitation with a volume ratio 1/3 THF/EG, offer a polymer free ethylene contamination. Date A point or period of time associated with an event in the lifecycle of the resource 2015 Source A related resource from which the described resource is derived Revista Politécnica Publisher An entity responsible for making the resource available Escuela Politécnica Nacional (EPN) Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Science (General), Technology (General) Relation A related resource <a href="https://revistapolitecnica.epn.edu.ec/ojs2/index.php/revista_politecnica2/article/view/592" target="_blank" rel="noreferrer noopener">https://revistapolitecnica.epn.edu.ec/ojs2/index.php/revista_politecnica2/article/view/592</a>