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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Santos, L. F. P. [1] ; Ribeiro, B. [2] ; Hein, L. R. O. [1] ; Botelho, E. C. [1] ; Costa, M. L. [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista UNESP, Sch Engn, Mat & Technol Dept, Guaratingueta - Brazil
[2] Univ Fed Sao Paulo UNIFESP, Inst Sci & Technol, Sao Jose Dos Campos - Brazil
Total Affiliations: 2
Document type: Journal article
Source: MATERIALS RESEARCH EXPRESS; v. 4, n. 11 NOV 2017.
Web of Science Citations: 2
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. (AU)

FAPESP's process: 16/12810-5 - Evaluation of fatigue strength of composites PEI/carbon fiber nanostructed with aeronautical applications
Grantee:Luis Felipe de Paula Santos
Support Opportunities: Scholarships in Brazil - Master