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ESTABILIZACIÓN DE MEZCLAS POLICLORURO DE VINILO/POLIESTIRENO CON UNA MONTMORILLONITA MODIFICADA

Authors: Inciarte, Helen; Oliva, Haydée; Ysea, Angel; Echeverri, David; Rios, Luis;

ESTABILIZACIÓN DE MEZCLAS POLICLORURO DE VINILO/POLIESTIRENO CON UNA MONTMORILLONITA MODIFICADA

Abstract

Se analizó la resistencia al desmezclado del sistema heterogéneo policloruro de vinilo (PVC)/poliestireno (PS) en presencia de una arcilla comercial modificada (Cloisite 10A, C10A). Las mezclas se prepararon usando tetrahidrofurano (THF) como solvente. La organoarcilla C10A se concentró en la fase rica en PVC, a pesar de la similitud estructural entre los modificadores orgánicos de la arcilla y el PS. La localización de la arcilla tuvo un efecto significativo en la estabilidadde las mezclas. A diferencia de cuando la arcilla se ubicó en la fase dispersa rica en PVC, la presencia de la organoarcilla en el PVC como fase continua, previno el desmezclado espontáneo, redujo el tamaño de los dominios dispersos de PS y promovió la adhesión interfacial. El incremento en el espaciamiento basal observado en los difractogramas, es consistente con la intercalación de cadenas poliméricas entre las láminas de arcilla. Las micrografías obtenidas por TEM revelaron la coexistencia de estructuras exfoliadas, intercaladas y de tactoides

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Keywords

Compatibilización, Nanocompuestos, Distribución de arcilla, Polimezcla

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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.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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