Cargando…

Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends

The present work is a novel attempt to understand the microstructure of styrene-ethylene-butylene-styrene (SEBS)/polystyrene (PS) blends not only through morphological studies, but also thermal, mechanical and rheological characterizations. SEBS/PS blends containing 10, 30 and 50 wt % PS were proces...

Descripción completa

Detalles Bibliográficos
Autores principales: Banerjee, Ritima, Ray, Suprakas Sinha, Ghosh, Anup K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415231/
https://www.ncbi.nlm.nih.gov/pubmed/30966435
http://dx.doi.org/10.3390/polym10040400
_version_ 1783403143012286464
author Banerjee, Ritima
Ray, Suprakas Sinha
Ghosh, Anup K.
author_facet Banerjee, Ritima
Ray, Suprakas Sinha
Ghosh, Anup K.
author_sort Banerjee, Ritima
collection PubMed
description The present work is a novel attempt to understand the microstructure of styrene-ethylene-butylene-styrene (SEBS)/polystyrene (PS) blends not only through morphological studies, but also thermal, mechanical and rheological characterizations. SEBS/PS blends containing 10, 30 and 50 wt % PS were processed in a micro-compounder and characterized. Scanning electron microscopy (SEM) studies, with selective staining of the PS phase, revealed the presence of PS as nanometer-sized domains, as well as phase-separated micrometer-sized aggregates. Blends with 30 and 50 wt % PS exhibited a fibrillar microstructure, obeying Hirsch’s model of short fiber composites. A remarkable increase in glass transition temperature indicated a strong interaction of the fibrils with SEBS. All blends showed two modes of relaxation corresponding to the two phases. A single mode of relaxation of the PS phase has been attributed to combined effects of the partial miscibility of the added PS, along with the interaction of the fibrils with SEBS. The long relaxation time of the elastomeric phase indicated the tendency of these materials to undergo time-dependent shrinkage in secondary processing operations. An increase in PS content resulted in the lowering of the shear viscosity and energy requirement for mixing, indicating the ease of processing.
format Online
Article
Text
id pubmed-6415231
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-64152312019-04-02 Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends Banerjee, Ritima Ray, Suprakas Sinha Ghosh, Anup K. Polymers (Basel) Article The present work is a novel attempt to understand the microstructure of styrene-ethylene-butylene-styrene (SEBS)/polystyrene (PS) blends not only through morphological studies, but also thermal, mechanical and rheological characterizations. SEBS/PS blends containing 10, 30 and 50 wt % PS were processed in a micro-compounder and characterized. Scanning electron microscopy (SEM) studies, with selective staining of the PS phase, revealed the presence of PS as nanometer-sized domains, as well as phase-separated micrometer-sized aggregates. Blends with 30 and 50 wt % PS exhibited a fibrillar microstructure, obeying Hirsch’s model of short fiber composites. A remarkable increase in glass transition temperature indicated a strong interaction of the fibrils with SEBS. All blends showed two modes of relaxation corresponding to the two phases. A single mode of relaxation of the PS phase has been attributed to combined effects of the partial miscibility of the added PS, along with the interaction of the fibrils with SEBS. The long relaxation time of the elastomeric phase indicated the tendency of these materials to undergo time-dependent shrinkage in secondary processing operations. An increase in PS content resulted in the lowering of the shear viscosity and energy requirement for mixing, indicating the ease of processing. MDPI 2018-04-03 /pmc/articles/PMC6415231/ /pubmed/30966435 http://dx.doi.org/10.3390/polym10040400 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Banerjee, Ritima
Ray, Suprakas Sinha
Ghosh, Anup K.
Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title_full Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title_fullStr Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title_full_unstemmed Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title_short Microstructure Development and Its Influence on the Properties of Styrene-Ethylene-Butylene-Styrene/Polystyrene Blends
title_sort microstructure development and its influence on the properties of styrene-ethylene-butylene-styrene/polystyrene blends
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415231/
https://www.ncbi.nlm.nih.gov/pubmed/30966435
http://dx.doi.org/10.3390/polym10040400
work_keys_str_mv AT banerjeeritima microstructuredevelopmentanditsinfluenceonthepropertiesofstyreneethylenebutylenestyrenepolystyreneblends
AT raysuprakassinha microstructuredevelopmentanditsinfluenceonthepropertiesofstyreneethylenebutylenestyrenepolystyreneblends
AT ghoshanupk microstructuredevelopmentanditsinfluenceonthepropertiesofstyreneethylenebutylenestyrenepolystyreneblends