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Thermophysical properties of foliated graphite/nickel reinforced polyvinyl chloride nanocomposites
Faculty
Science
Year:
2012
Type of Publication:
Article
Pages:
1144-1153
Authors:
Al-Ghamdi, A. A, Al-Hartomy, Omar A, Al-Ghamdi, Attieh A, Daiem, A. M. Abdel, El-Tantawy, Farid, Al-Salamy, Falleh
DOI:
10.1002/app.35062
Journal:
JOURNAL OF APPLIED POLYMER SCIENCE WILEY-BLACKWELL
Volume:
124
Research Area:
Polymer Science
ISSN
ISI:000298672800030
Keywords :
polyvinyl chloride, graphite-nickel nanoparticles, nanocomposites, network structure, thermal properties
Abstract:
A novel, polymer-based foliated graphite/nickel nanocomposites with high thermal conductivity, mechanical properties, and low dielectric constant was developed. The network structure of polyvinyl chloride (PVC) reinforced foliate graphite and nickel nanoparticles (GN) were tested in terms of X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive x-ray analysis (EDX), and thermal-gravimetric analyses (TGA). Thermogravimetric analysis revealed a large improvement in the thermal stability of PVC/GN nanocomposites. Thermal conductivity and diffusivity of the composites increased with increasing GN content and temperature. The obtained experimental thermal conductivity result are compared with the existing theoretical models. The measured values of thermal conductivity were in excellent agreement with those calculated from the Agari model. In addition, specific heat, coefficient of thermal expansion (TEC), micro porosity, and crosslinking density (CLD) of composites were investigated. The mechanical properties such as tensile strength, tensile modulus, hardness, and elongation at break of the nanocomposites were improved with inclusion GN which is proportional to GN content. Finally, the dielectric properties of PVC/GN nanocomposites as a function of frequency have been investigated in details. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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