Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Author Santos, L. F. P. Google Scholar
Ribeiro, B. Autor UNIFESP Google Scholar
Hein, L. R. O. Google Scholar
Botelho, E. C. Google Scholar
Costa, M. L. Google Scholar
Abstract In this work, nanostructured composites of polyetherimide (PEI) with addition of functionalized multiwall carbon nanotube (MWCNT) were processed via solution mixing. After processing, these nanocomposites were evaluated by thermogravimetry (TGA), dynamic-mechanical analysis (DMA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Subsequently, the nanocomposite was processed with carbon fibers by using hot compression molding. In order to evaluate interlaminar fracture strength, the processed laminates were mechanically evaluated by interlaminar shear strength (ILSS) and compression shear test (CST). Also, the Weibull distribution was employed to help in the statistical treatment of the data obtained from the mechanical tests. With regards to the fracture of the specimens, optical microscopy was used for the evaluation of the material. The addition of 1 wt% of MWCNT in the polymer matrix increased both thermal stability and viscoelastic behavior of the material. These improvements positively impacted the mechanical properties, generating a 16% and 58% increase in the short-beam strength and apparent interlaminar shear, respectively. In addition, it can be verified from morphological analysis of the fracture a change in the failure mode of the laminate by the incorporation of MWCNT. This behavior can be proven from CST test where there was no presence of the shear force by compression.
Keywords multiwalled carbon nanotube
thermal analysis
mechanical properties
xmlui.dri2xhtml.METS-1.0.item-coverage Bristol
Language English
Sponsor Sao Paulo Research Foundation (FAPESP) from Brazil
National Council for Scientific and Technological Development (CNPq) from Brazil
Grant number FAPESP: 2016/12810-5
Date 2017
Published in Materials Research Express. Bristol, v. 4, n. 11, p. -, 2017.
ISSN 2053-1591 (Sherpa/Romeo, impact factor)
Publisher Iop Publishing Ltd
Extent -
Access rights Closed access
Type Article
Web of Science ID WOS:000417559600009

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