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Your search keyword '"Javad Heidarian"' showing total 4 results
Start Over Author "Javad Heidarian" Publisher associacao brasileira de polimeros
4 results on '"Javad Heidarian"'

1. Effect of compatibiliser on the properties of polypropylene/glass fibre/nanoclay composites

Author

Normasmira Abd Rahman, Aziz Hassan, and Javad Heidarian

Subjects
compatibiliser, dynamic mechanical properties, hybrid materials, thermal behavior, Chemical technology, TP1-1185
Abstract

Abstract Glass fibre (GF), nanoclay (NC) and hybrid composites compatibilised with maleic anhydride polypropylene (MAPP) were prepared by extrusion and injection moulding. The fourier transform infra-red spectra revealed the characteristic absorption peaks of MAPP in the compatibilised GF and NC composites. A decrement in the peak intensity of X-ray diffraction patterns of NC composite was obtained as the MAPP content increased indicating a partial exfoliation of NC. The thermogravimetric analysis showed that the incorporation of MAPP into hybrid composites reduced the thermal stability of the material. The dynamic mechanical analysis showed an increase in the storage modulus in the hybrid composites with lower content of MAPP due to the enhancement in the interfacial adhesion between the GF, NC and PP matrix.

Published
2018
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2. Improving the thermal properties of fluoroelastomer (Viton GF-600S) using acidic surface modified carbon nanotube

Author

Javad Heidarian, Aziz Hassan, and Nor Mas Mira Abd Rahman

Subjects
nanocomposites, fluoroelastomer, acidic surface modified, carbon nanotube, thermal properties, thermal aging, Chemical technology, TP1-1185
Abstract

AbstractAcid surface modified carbon nanotube (MCNT)-, Carbon nanotube (CNT)-filled fluoroelastomer (FE) and unfilled-FE were prepared (MCNT/FE, CNT/FE and FE). The compounds were subjected to thermogravimetric analysis (TGA) and heat air aging, and characterized by Energy Dispersive X-Ray (EDX). Results showed that MCNT improved the thermal properties of FE, resulting in a larger amount of FE and char remaining in the temperature range of 400-900 °C relative to unfilled FE and CNT/FE. The MCNT/FE TGA curve shifted towards higher temperatures compared to CNT/FE and FE. The same results also revealed that higher percentages of FE were undegraded or less degraded especially near MCNT in the temperature range of 400-540 °C. Energy Dispersive X-Ray (EDX) results indicated that the percentage of carbon and fluorine in the residue of TGA scans, up to 560 °C, of MCNT/FE were the same as CNT/FE, and were higher than FE. EDX results of TGA residue (run up to 900 °C) showed that most of the undegraded FE, which was not degraded at temperatures below 560 °C, was degraded from 560 °C to 900 °C in both MCNT/FE and CNT/FE, with the char in MCNT/FE being more than that in CNT/FE. EDX analysis of thermal aged specimens under air showed that, with increasing aging time, a greater percentage of C, O and F was lost from the surface of filler/FE and FE. The order of element loss after 24 hour aging time was: MCNT/FE > FE > CNT/FE.

Published
2015
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3. Effect of compatibiliser on the properties of polypropylene/glass fibre/nanoclay composites

Author

Normasmira A. Rahman, Javad Heidarian, and Aziz Hassan

Subjects
010407 polymers, Thermogravimetric analysis, Materials science, Glass fiber, 02 engineering and technology, thermal behavior, lcsh:Chemical technology, 01 natural sciences, chemistry.chemical_compound, hybrid materials, Chemical Engineering (miscellaneous), lcsh:TP1-1185, Thermal stability, Composite material, Polypropylene, compatibiliser, dynamic mechanical properties, Organic Chemistry, Maleic anhydride, Dynamic mechanical analysis, 021001 nanoscience & nanotechnology, Exfoliation joint, 0104 chemical sciences, chemistry, 0210 nano-technology, Hybrid material
Abstract

Glass fibre (GF), nanoclay (NC) and hybrid composites compatibilised with maleic anhydride polypropylene (MAPP) were prepared by extrusion and injection moulding. The fourier transform infra-red spectra revealed the characteristic absorption peaks of MAPP in the compatibilised GF and NC composites. A decrement in the peak intensity of X-ray diffraction patterns of NC composite was obtained as the MAPP content increased indicating a partial exfoliation of NC. The thermogravimetric analysis showed that the incorporation of MAPP into hybrid composites reduced the thermal stability of the material. The dynamic mechanical analysis showed an increase in the storage modulus in the hybrid composites with lower content of MAPP due to the enhancement in the interfacial adhesion between the GF, NC and PP matrix.

Published
2018

4. Improving the thermal properties of fluoroelastomer (Viton GF-600S) using acidic surface modified carbon nanotube

Author

Aziz Hassan, Nor Mas Mira Abd Rahman, and Javad Heidarian

Subjects
Thermogravimetric analysis, Materials science, Nanocomposite, Organic Chemistry, thermal properties, chemistry.chemical_element, Carbon nanotube, Atmospheric temperature range, lcsh:Chemical technology, law.invention, chemistry, law, fluoroelastomer, nanocomposites, Fluorine, Chemical Engineering (miscellaneous), Fluoroelastomer, lcsh:TP1-1185, Char, thermal aging, Composite material, carbon nanotube, Carbon, Nuclear chemistry, acidic surface modified
Abstract

Acid surface modified carbon nanotube (MCNT)-, Carbon nanotube (CNT)-filled fluoroelastomer (FE) and unfilled-FE were prepared (MCNT/FE, CNT/FE and FE). The compounds were subjected to thermogravimetric analysis (TGA) and heat air aging, and characterized by Energy Dispersive X-Ray (EDX). Results showed that MCNT improved the thermal properties of FE, resulting in a larger amount of FE and char remaining in the temperature range of 400-900 °C relative to unfilled FE and CNT/FE. The MCNT/FE TGA curve shifted towards higher temperatures compared to CNT/FE and FE. The same results also revealed that higher percentages of FE were undegraded or less degraded especially near MCNT in the temperature range of 400-540 °C. Energy Dispersive X-Ray (EDX) results indicated that the percentage of carbon and fluorine in the residue of TGA scans, up to 560 °C, of MCNT/FE were the same as CNT/FE, and were higher than FE. EDX results of TGA residue (run up to 900 °C) showed that most of the undegraded FE, which was not degraded at temperatures below 560 °C, was degraded from 560 °C to 900 °C in both MCNT/FE and CNT/FE, with the char in MCNT/FE being more than that in CNT/FE. EDX analysis of thermal aged specimens under air showed that, with increasing aging time, a greater percentage of C, O and F was lost from the surface of filler/FE and FE. The order of element loss after 24 hour aging time was: MCNT/FE > FE > CNT/FE.

Published
2015

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