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Mejoramiento de las Propiedades de Tensión en WPC de LDPE: HIPS/Fibra Natural Mediante Entrecruzamiento con DCP

Authors: Delgado Tobón, Arnoldo Emilio; Aperador Chaparro, William Arnulfo; Gómez Rivera, William;

Mejoramiento de las Propiedades de Tensión en WPC de LDPE: HIPS/Fibra Natural Mediante Entrecruzamiento con DCP

Abstract

Fibra de Retamo Liso (telinemonspessulana) fue mezclada en una matriz polimérica formada por: polietileno de baja densidad (LDPE) y poliestireno de alto impacto (HIPS) en relación 70:30 respectivamente. La fibra natural fue sometida a reducción de tamaño entre 1700 y 850 µm; se le realizó tratamiento superficial de mercerización; el contenido de humedad fue 0,17%. El análisis termo gravimétrico (TGA) muestra que la fibra tratada tiene estabilidad de 200,53 °C. La elaboración del compuesto se realizó en mezclador interno y la técnica de obtención de las probetas fue mediante moldeo por compresión. Se evaluó el efecto del agente entrecruzante peróxido de dicumilo (DCP) en compuestos con varios porcentajes de fibra: 0; 10; 25; 50 phr. La adición de DCP (1 phr) en los compuestos, mejora significativamente las propiedades de tensión con respecto a similares concentraciones de fibra; sin embargo, esta diferencia en los valores de las propiedades disminuye progresivamente cuando la cantidad de fibra se aproxima a 50 phr. El aumento en la concentración de fibra afecta negativamente las propiedades de tensión, con excepción del Módulo de Elasticidad y la Resistencia a la Fluencia. La causa principal es originada por la baja adhesión interfacial fibra natural-matriz polimérica, claramente evidenciada en las imágenes SEM.

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Keywords

polietileno de baja densidad, peróxido de dicumilo, low density polyethylene, Chemical technology, TP1-1185, high impact polystyrene, TelineMonspessulana, poliestireno de alto impacto, dicumyl peroxide, compuesto de plástico y madera (WPC), wood plastic composite (WPC)

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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!
2
Average
Average
Average
Green
gold