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Degradación hidrolítica del polietilen-tereftalato (Pet)

Authors: Contreras Romero, Elbert Enrique; Sánchez, Andrés Felipe; Muñoz, John Rober; Hoyos, Alejandro; Gartner, Carmiña;

Degradación hidrolítica del polietilen-tereftalato (Pet)

Abstract

RESUMEN: El uso masivo del polietilen-tereftalato (PET) genera gran cantidad de residuos sólidos; es por ello que se han propuesto diversas maneras para su reciclaje. En el presente trabajo se estudió la degradación hidrolítica de PET reciclado en medio básico, como investigación del curso de Materiales Poliméricos de Ingeniería de Materiales. Se degradó PET de botella fragmentado, en hidróxido de sodio etanólico 2 M a 80°C por dos horas. Se cuantificó el porcentaje de degradación por gravimetría y los subproductos obtenidos fueron identificados por espectroscopía infrarroja (FTIR). Se alcanzó un porcentaje de degradación entre 84 y 90%, para tres tamaños de partícula utilizados, de lo cual se concluye que no es necesario fragmentar muy finamente el material de partida. Como subproducto de la hidrólisis se obtuvo uno de los monómeros de partida. Los resultados obtenidos permiten concluir la viabilidad del método implementado, el cual emplea condiciones menos drásticas que las reportadas en la literatura.

ABSTRACT: The extended use of Polyethylene Terephthalate (PET) has generated large amounts of solid waste. To overcome this problem several methods for PET recycling have been proposed. In this work we carried out the alkaline hydrolysis of recycled PET, as a research during the course of Polymeric Materials. The method consists in grinding PET from discarded bottles followed by a two hours hydrolysis in ethanolic 2M sodium hydroxide at 80° C. The degradation percentage was quantified gravimetrically and the by-products obtained were characterized by infrared spectroscopy (FTIR) and one of them was identified as the initial monomers. The method yielded a degradation percentage between 82 and 90, for the three particle sizes that were studied. This results lead us to conclude that it is not necessary to finely grind the PET to perform the degradation process. These results showed the feasibility of the proposed method, using milder conditions than those found in literature.

Country
Colombia
Keywords

Optimización de parámetros, Reciclaje, Materiales poliméricos, 610, Degradación de polímeros, PET, Polietilentereftalato, Polímeros antibacterianos, Hidrólisis

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green