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Separación de fases y cristalinidad en mezclas epoxy/poli-3-hidroxibutirato

Authors: Tognana, Sebastián; Salgueiro, Walter; Silva, Leonel;

Separación de fases y cristalinidad en mezclas epoxy/poli-3-hidroxibutirato

Abstract

En este trabajo se estudiaron mezclas epoxy/poli-3-hidroxibutirato (PHB) en dos proporciones distintas 90/10 y 85/15. Para ello se prepararon muestras sometiéndolas a temperaturas de 80 ºC y 120 ºC, a efectos de producir el curado del epoxy. Se analizó la separación de fases y la cristalización del PHB mediante microscopía óptica y calorimetría diferencial de barrido. Asimismo la estructura lamelar del PHB se caracterizó mediante dispersión de rayos X de bajo ángulo. Se encontraron diferencias significativas entre las dos proporciones estudiadas; mientras que la muestra 90/10 presenta miscibilidad, la muestra 85/15 indica una separación de fases. Asimismo se encontró que, sobre todo para la muestra 90/10, el epoxy afecta considerablemente la estructura lamelar del PHB. Los resultados se analizaron en términos de la competencia entre los procesos de cristalización y separación de fases.

Country
Argentina
Keywords

crystallization, PHB, Chemical technology, Blend, TP1-1185, EPOXI, epoxy, MEZCLAS, CRISTALIZACIÓN, cristalización, https://purl.org/becyt/ford/1.3, Mezclas poliméricas, https://purl.org/becyt/ford/1

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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!
1
Average
Average
Average
Green
gold