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10 results on '"Mahmoudian, Shaya"'

4. Mechanical and Thermal Properties of Polyamide 6 Nanocomposite Toughened with Epoxidised Natural Rubber-25

Author

Hassan Azman, Nematzadeh Navid, Mahmoudian Shaya, and Uzir Wahit Mat

Subjects
Thermogravimetric analysis, Nanocomposite, Materials science, Polymer nanocomposite, Mechanical Engineering, Izod impact strength test, chemistry.chemical_compound, Montmorillonite, chemistry, Natural rubber, Mechanics of Materials, visual_art, Ultimate tensile strength, visual_art.visual_art_medium, General Materials Science, Thermal stability, Composite material
Abstract

Polyamide (PA6) is an engineering plastic with wide range of applications and the development in the field of montmorillonite (MMT) filled polymer nanocomposites has resulted in the development of PA6/MMT nanocomposites. However, MMT filled PA6 nanocomposites are notch sensitive and brittle at low temperatures, which posed as a major setback for many of its applications. The main objective of this study is to enhance the toughness of PA6/MMT (100/4) nanocomposites with epoxidised natural rubber-25 (ENR25). The ENR-25 content in the composites ranged from 15 to 30 wt%. The PA6/ENR/MMT nanocomposites were extruded and injection molded into tensile and impact test samples. The addition of ENR25 into PA6/MMT nanocomposites improved the impact strength of the nanocomposites while tensile modulus and tensile strength decreased with increasing ENR25 content. The thermal properties of PA6/ENR/MMT nanocomposites were also investigated via thermal gravimetric analysis (TGA). Both T10% and derivative thermal analysis (DTA) determined the lower thermal stability of PA6/MMT nanocomposites after addition of ENR.

Published
2011

5. Preparation and Thermal Properties of Cellulose/Layered Silicate Montmorillonite Nanocomposites Prepared via Ionic Liquids

Author

Uzir Wahit Mat, A.A. Yussuf, Mahmoudian Shaya, and Nematzadeh Navid

Subjects
Thermogravimetric analysis, Materials science, Nanocomposite, Mechanical Engineering, Intercalation (chemistry), Regenerated cellulose, chemistry.chemical_compound, Montmorillonite, chemistry, Chemical engineering, Mechanics of Materials, mental disorders, Ionic liquid, Ultimate tensile strength, General Materials Science, Cellulose, Composite material
Abstract

Environmentally friendly nanocomposites comprising of cellulose and montmorillonite (MMT) were prepared via a green solvent, ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl) using solution casting method. The cellulose concentration and MMT content were varied according to predetermine formulation. The regenerated cellulose nanocomposites were characterized using X-ray diffraction (XRD). The thermal and thermal oxidative properties of regenerated cellulose nanocomposites were studied by thermogravimetric analysis (TGA). Mechanical properties of the nanocomposites films were investigated by tensile strength measurements. The intercalation and exfoliation of MMT in the cellulose matrix were confirmed by XRD results. TGA results showed an increment in degradation temperature and char yield for the nanocomposites. Multistep TGA graph was observed for degradation under air. The results indicated that the addition of MMT up to 6 wt% in regenerated cellulose matrix improved the tensile properties.

Published
2011

8. Graphene reinforced regenerated cellulose nanocomposite fibers prepared by lyocell process.

Author

Mahmoudian, Shaya, Reza Sazegar, Mohammad, Afshari, Nazanin, and Uzir Wahit, Mat

Subjects
*POLYMERIC nanocomposites, *GRAPHENE, *CELLULOSE fibers, *THERMAL stability, *X-ray diffraction, *SCANNING electron microscopy, *MECHANICAL properties of polymers, *ELECTRIC properties of nanocomposite materials
Abstract

Nanocomposites of regenerated cellulose containing different amounts of graphene nanoplatelets (GNPs) (0.5, 1, and 2 wt%) have been prepared by wet spinning using Lyocell process. The thermal stability, mechanical, and electrical properties of the nanocomposite fibers were studied. The nanocomposite fibers were characterized by Fourier transform infrared (FTIR), Transmission electron microscopy, X-ray diffraction, and Scanning electron microscopy (SEM). The tenacity and initial modulus of the nanocomposite fibers improved by 66% and 61%, respectively with the addition of 2 wt% GNPs. The T20 decomposition temperature of regenerated cellulose fibers improved with the addition of GNPs up to 2 wt%. The morphology by SEM revealed exfoliated dispersion of GNPs into the regenerated cellulose matrix which subsequently resulted in good interaction between the nanofillers and the matrix. The addition of exfoliated GNPs generated electrical conductivity. The nanocomposite fibers containing 2 wt% GNPs has a conductivity of 2.3 × 10−4 S/cm. The FTIR spectra showed that the addition of GNPs in regenerated cellulose did not result in any noticeable change in its chemical structure. The resulting nanocomposite may find potential applications in the areas of carbon fiber precursor, conductive fibers, electrical tools, and biodegradable composites. POLYM. COMPOS., 38:E81-E88, 2017. © 2015 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

Published
2017
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