Electrical, Thermal and Mechanical Properties of Epoxy/CNT/Calcium Carbonate Nanocomposites

Author(s)

Eduardo Henrique Backes ^[1] ; Tarcísio Sanson Sene ^[2] ; Fabio Roberto Passador ^[3] ; Luiz Antonio Pessan ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Engn Mat, Via Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Universidade Federal de São Carlos. Departamento de Engenharia de Materiais - Brasil

^[3] Univ Fed Sao Paulo, Inst Ciencia & Tecnol, Rua Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 21, n. 1 2017-12-04.

Abstract

Epoxy/CNT and epoxy/CNT/calcium carbonate nanocomposites were produced via in situ polymerization assisted by ultrasonication without solvent and electrical, mechanical, thermal and thermomechanical properties of nanocomposites were evaluated. Epoxy/CNT presented very low percolation threshold, near 0.05 wt % and nanocomposites with higher contents of CNT presented further increase in electrical conductivity. The addition of calcium carbonate in epoxy/CNT nanocomposites increased the electrical conductivity, due to volume exclusion phenomena. Regarding thermal properties, due to the low content of the CNT and calcium carbonate no changes in glass transition (Tg) were observed. DMA results showed no significant changes in thermomechanical properties, once the contents of CNT and calcium carbonate are below stiffness threshold, however an increase of flexural modulus by adding CNT and calcium carbonate was observed. (AU)

• FAPESP's process: 14/16299-8 - Evaluation of mechanical, thermal and electric properties of hybrid nanocomposites epoxy/MWCNT/mineral fillers
• Grantee: Eduardo Henrique Backes
• Support Opportunities: Scholarships in Brazil - Master