| Full text | |
| Author(s): |
Ludimilla Barbosa Ferreira
[1]
;
Rayane de Souza Fernandes
[2]
;
Rosario Elida Suman Bretas
[3]
;
João Paulo Ferreira Santos
[4]
Total Authors: 4
|
| Affiliation: | [1] Centro Federal de Educação Tecnológica de Minas Gerais. Departamento de Engenharia de Materiais - Brasil
[2] Centro Federal de Educação Tecnológica de Minas Gerais. Departamento de Engenharia de Materiais - Brasil
[3] Universidade Federal de São Carlos. Departamento de Engenharia de Materiais - Brasil
[4] Centro Federal de Educação Tecnológica de Minas Gerais. Departamento de Engenharia de Materiais - Brasil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | POLIMEROS-CIENCIA E TECNOLOGIA; v. 30, n. 4 2021-03-12. |
| 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. (AU) | |
| FAPESP's process: | 16/03667-4 - Electrospinning of ceramic nanofibers for polymeric nanocomposites |
| Grantee: | Rosario Elida Suman Bretas |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 13/03118-2 - Visulization, Characterization and Manipulation of Ferroelectric and Magnetic Domains in Multiferroics |
| Grantee: | André Marino Gonçalves |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 14/17597-2 - Hybrid nanocomposites based on block copolymers for application in supercapacitors |
| Grantee: | João Paulo Ferreira Santos |
| Support Opportunities: | Scholarships in Brazil - Doctorate |