Search

Your search keyword '"Rayane de Souza Fernandes"' showing total 2 results
Start Over Author "Rayane de Souza Fernandes"
2 results on '"Rayane de Souza Fernandes"'

1. Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior

Author

Ludimilla Barbosa Ferreira, Rayane de Souza Fernandes, Rosario Elida Suman Bretas, and João Paulo Ferreira Santos

Subjects
SIS, MWCNT, rheological percolation, electrical percolation, self-assembly, Chemical technology, TP1-1185
Abstract

Abstract In this work, nanocomposites based on the triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) thermoplastic elastomer filled with multiwall carbon nanotubes (MWCNT) were obtained by melt mixing. The nanocomposites were characterized by oscillatory rheometry, electrical resistivity, small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM). The results showed that both, rheological and electrical percolation were achieved at MWCNT loadings between 1-3 vol.%. Rheological tests revealed that the insertion of MWCNT into SIS significantly enhanced the process of relaxation of SIS blocks. Resistivity measurements revealed that conductive nanocomposites were obtained at MWCNT loadings ~1.6 vol.%. The electrical resistivity decreased eleven orders of magnitude from neat SIS to SIS/ 5 vol.% MWCNT. Finally, SAXS and TEM showed that the melt mixing process and the presence of MWCNT hampered the self-assembly of SIS into well-ordered domains.

Full Text
View/download PDF

2. Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior

Author

Ludimilla Barbosa Ferreira, Rosario E. S. Bretas, Rayane de Souza Fernandes, and João Paulo Ferreira Santos

Subjects
Nanocomposite, Materials science, Rheometry, Small-angle X-ray scattering, MWCNT, Chemical technology, Organic Chemistry, Carbon nanotube, self-assembly, TP1-1185, law.invention, SIS, rheological percolation, electrical percolation, Transmission electron microscopy, Electrical resistivity and conductivity, law, Percolation, Chemical Engineering (miscellaneous), Thermoplastic elastomer, Composite material
Abstract

In this work, nanocomposites based on the triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) thermoplastic elastomer filled with multiwall carbon nanotubes (MWCNT) were obtained by melt mixing. The nanocomposites were characterized by oscillatory rheometry, electrical resistivity, small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM). The results showed that both, rheological and electrical percolation were achieved at MWCNT loadings between 1-3 vol.%. Rheological tests revealed that the insertion of MWCNT into SIS significantly enhanced the process of relaxation of SIS blocks. Resistivity measurements revealed that conductive nanocomposites were obtained at MWCNT loadings ~1.6 vol.%. The electrical resistivity decreased eleven orders of magnitude from neat SIS to SIS/ 5 vol.% MWCNT. Finally, SAXS and TEM showed that the melt mixing process and the presence of MWCNT hampered the self-assembly of SIS into well-ordered domains.

Catalog

Books, media, physical & digital resources
See catalog results