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Title Nanofiller dispersion, morphology, mechanical behavior and electrical properties of nanostructured styrene-butydiene based triblock compolymer/CNT composites
Date 07.11.2019
Number 57226
Abstract A nanostructured linear triblock copolymer based on styrene and butadiene with lamellar morphology is filled with multiwalled carbon nanotubes (MWCNTs) of up to 1 wt% by melt compounding. This study deals with the dispersability of the MWCNTs within the nanostructured matrix and its consequent impact on block copolymer (BCP) morphology, deformation behavior, and the electrical conductivity of composites. By adjusting the processing parameters during melt mixing, the dispersion of the MWCNTs within the BCP matrix are optimized. In this study, the morphology and glass transition temperatures (Tg) of the hard and soft phase are not significantly influenced by the incorporation of MWCNTs. However, processing-induced orientation effects of the BCP structure are reduced by the addition of MWCNT accompanied by a decrease in lamella size. The stress-strain behavior of the triblock copolymer/MWCNT composites indicate higher Young’s modulus and pronounced yield point while retaining high ductility (strain at break ~ 400%). At a MWCNT content of 1 wt%, the nanocomposites are electrically conductive, exhibiting a volume resistivity below 3 × 103 O·cm. Accordingly, the study offers approaches for the development of mechanically flexible functional materials while maintaining a remarkable structural property profile.
URL https://doi.org/10.3390/POLYM11111831
Publisher Polymers
Identifier
Citation Polymers 11 (2019) 1831
DOI https://doi.org/10.3390/POLYM11111831
Authors Staudinger, U. ; Satapathy, B. K. ; Jehnichen, D.
Tags block copolymer carbon nanotubes nanofiller dispersion phase behavior morphology mechanical properties electrical conductivity

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