Rheological characterization of nanostructured material based on Polystyrene-b-poly(ethylene-butylene)-b-polystyrene (SEBS) block copolymer: Effect of block copolymer composition and nanoparticle geometry

Block copolymer (BCP) nanocomposite systems are of broad interest; however, reports on the role of nanoparticles on microphase separation behavior are rare. The goal of present study is to investigate the preparation of composite nanostructured materials containing Multi-Walled Carbon Nanotubes (MWC...

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Bibliographic Details
Published in:Composites science and technology 2017-09, Vol.149, p.192-206
Main Authors: Hasanabadi, Noushin, Nazockdast, Hossein, Balog, Sandor, Lattuada, Marco
Format: Article
Language:English
Subjects:
Block copolymer nanocomposites
Block copolymers
CNT
Composition effects
Copolymers
Ethylene
Graphene
Graphene nanosheets
Microstructural development
Multi wall carbon nanotubes
Nanocomposites
Nanoparticles
Nanostructured materials
Polystyrene
Polystyrene resins
Rheological properties
Segments
Separation
Unsteady flow
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Summary:Block copolymer (BCP) nanocomposite systems are of broad interest; however, reports on the role of nanoparticles on microphase separation behavior are rare. The goal of present study is to investigate the preparation of composite nanostructured materials containing Multi-Walled Carbon Nanotubes (MWCNTs) or graphene nanoplates. BCP nanocomposites based on the linear triblock copolymer, Polystyrene-b-poly(ethylene-butylene)-b-polystyrene (SEBS), with different morphological structure were prepared by melt mixing. The results of temperature sweep experiments showed an enhancing effect of both MWCNT and graphene nanosheets on increasing the microphase separation temperature as well as accelerating its kinetic, resulting from the confinement of BCP segments, with graphene nanosheets providing a more severely confined geometry for polystyrene segments in contrast to MWCNTs. Additionally, DMTA results indicated a promotion of the BCP microphase separation by incorporation of nanoparticles. Transient flow measurements followed by time sweep test suggested the existence of a special 3D network microstructure caused by nanoparticles/domain interactions.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2017.06.022