scholarly journals Effect of Nanodiamond Particles on Properties of Epoxy Composites

2008 ◽  
Vol 17 (1) ◽  
pp. 096369350801700 ◽  
Author(s):  
Zdeno Špitalský ◽  
Alexander Kromka ◽  
Libor Matějka ◽  
Peter Černoch ◽  
Jana Kovářová ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Light Transmittance ◽  
Cross Linking ◽  
Amino Groups ◽  
Multiwalled Carbon ◽  
Epoxy Network ◽  
Epoxy Nanocomposite ◽  
Thermal Stability Of

The epoxy nanocomposites filled with 0.1, 0.5, and 1 wt% nanodiamonds (nanoD) were prepared and their properties were compared with neat epoxy network or epoxy nanocomposite filled with 1 wt% multiwalled carbon nanotubes (MWCNTs). The obtained nanoD-epoxy composites increased significantly thermal stability of prepared nanocomposites in comparison with neat epoxy matrix. The exponential decay of light transmittance with increasing concentration of nanoD in sample was observed. The values of storage modulus G` and glass transition temperature Tg significantly decreased by addition of nanoD to epoxy network. This is caused by inhibition of cross-linking reaction of epoxy- and amino- groups by nanoD.

scholarly journals Effect of Morphology of Calcium Carbonate on Toughness Behavior and Thermal Stability of Epoxy-Based Composites

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 178 ◽  
Author(s):  
Guijun Yang ◽  
Young-Jung Heo ◽  
Soo-Jin Park
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Fracture Toughness ◽  
Filler Content ◽  
Flexural Modulus ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Caco3 Nanoparticles ◽  
Degradation Temperature ◽  
Thermal Stability Of

In this study, the modification of an epoxy matrix with different amounts of cube-like and rod-like CaCO3 nanoparticles was investigated. The effects of variations in the morphology of CaCO3 on the mechanical properties and thermal stability of the CaCO3/epoxy composites were studied. The rod-like CaCO3/epoxy composites (EP-rod) showed a higher degradation temperature (4.5 °C) than neat epoxy. The results showed that the mechanical properties, such as the flexural strength, flexural modulus, and fracture toughness of the epoxy composites with CaCO3 were enhanced by the addition of cube-like and rod-like CaCO3 nanoparticles. Moreover, the mechanical properties of the composites were enhanced by increasing the amount of CaCO3 added but decreased when the filler content reached 2%. The fracture toughness Kic and fracture energy release rate Gic of cube-like and rod-like CaCO3/epoxy composites (0.85/0.74 MPa m1/2 and 318.7/229.5 J m−2, respectively) is higher than the neat epoxy (0.52 MPa m1/2 and 120.48 J m−2).

Cross-linking of atoms and thermal stability of new MDF compositions

1996 ◽  
Vol 46 (2) ◽  
pp. 479-487 ◽  
Author(s):  
M. Drábik ◽  
Lubica Gáliková ◽  
Zuzana Sadleková ◽  
Mária Kubranová
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Thermal Stability Of

Influence of the Precursor Cross-Linking Route on the Thermal Stability of Si−B−C−O Ceramics

2008 ◽  
Vol 20 (22) ◽  
pp. 7148-7156 ◽  
Author(s):  
Vladislav Ischenko ◽  
Eckhard Pippel ◽  
Jörg Woltersdorf ◽  
B. Rodrigue Ngoumeni Yappi ◽  
Ralf Hauser ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Thermal Stability Of

Effect of silica content on thermal stability of fumed silica/epoxy composites

2008 ◽  
Vol 93 (12) ◽  
pp. 2133-2137 ◽  
Author(s):  
J. Tarrío-Saavedra ◽  
J. López-Beceiro ◽  
S. Naya ◽  
R. Artiaga
Keyword(s):  
Thermal Stability ◽  
Fumed Silica ◽  
Silica Content ◽  
Epoxy Composites ◽  
Thermal Stability Of

scholarly journals Thermal decomposition kinetic study of multiwalled carbon nanotube buckypaper-reinforced poly(ether-imide) composites

2017 ◽  
Vol 32 (1) ◽  
pp. 62-75 ◽  
Author(s):  
Bruno Ribeiro ◽  
LFP Santos ◽  
AL Santos ◽  
ML Costa ◽  
EC Botelho
Keyword(s):  
Thermal Stability ◽  
Carbon Nanotube ◽  
Life Time ◽  
Strong Increase ◽  
Multiwalled Carbon ◽  
Vacuum Filtration ◽  
Degradation Temperature ◽  
Triton X ◽  
Thermal Stability Of ◽  
Filtration Technique

Poly(ether-imide) (PEI)-based composites filled with multiwalled carbon nanotubes in a dispersed form (1.0 wt%) and as buckypaper (BP) (25 wt%) have been prepared by mixing solution and hot compression molding technique, respectively. Vacuum filtration technique with the aid of water-based surfactant Triton X-100 was employed to produce BP sheets. The thermal stability of the composites was evaluated by thermogravimetric analysis and revealed a strong increase in thermal degradation temperature when BPs were used as nanofiller. Ozawa–Wall–Flyn model was used to determine the kinetic parameters. It was observed an increase in activation energy as the nanotubes concentration rise, suggesting the formation of more thermally stable systems. In addition, half-life time as function of temperature demonstrated that BP-based composites could operate for 3200 years at 200°C. These results concluded that carbon nanotube BP could contribute to improve significantly the thermal stability of PEI matrix.

scholarly journals Antimicrobial Properties of Chitosan-Alumina/f-MWCNT Nanocomposites

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Monaheng Masheane ◽  
Lebea Nthunya ◽  
Soraya Malinga ◽  
Edward Nxumalo ◽  
Tobias Barnard ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Polymer Matrix ◽  
Antimicrobial Properties ◽  
Inversion Method ◽  
Bacterial Strains ◽  
Multiwalled Carbon ◽  
Simple Phase ◽  
Phase Inversion Method ◽  
Thermal Stability Of ◽  
Sem Analyses

Antimicrobial chitosan-alumina/functionalized-multiwalled carbon nanotube (f-MWCNT) nanocomposites were prepared by a simple phase inversion method. Scanning electron microscopy (SEM) analyses showed the change in the internal morphology of the composites and energy dispersive spectroscopy (EDS) confirmed the presence of alumina and f-MWCNTs in the chitosan polymer matrix. Fourier transform infrared (FTIR) spectroscopy showed the appearance of new functional groups from both alumina and f-MWCNTs, and thermogravimetric analysis (TGA) revealed that the addition of alumina and f-MWCNTs improved the thermal stability of the chitosan polymer. The presence of alumina and f-MWCNTs in the polymer matrix was found to improve the thermal stability and reduced the solubility of chitosan polymer. The prepared chitosan-alumina/f-MWCNT nanocomposites showed inhibition of twelve strains of bacterial strains that were tested. Thus, the nanocomposites show a potential for use as a biocide in water treatment for the removal of bacteria at different environmental conditions.

scholarly journals Effect of Multiwalled Carbon Nanotubes (MWNT) on the Properties of High Impact Polystyrene (HIPS)

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Juan Li
Keyword(s):  
Thermal Stability ◽  
Flame Retardancy ◽  
High Impact ◽  
Melt Blending ◽  
Flow Properties ◽  
Multiwalled Carbon ◽  
Elongation At Break ◽  
Morphological Behavior ◽  
The Impact ◽  
Thermal Stability Of

The composites of HIPS/MWNT were prepared by melt blending. The effects of the content of MWNT on the flow, mechanical, and flame retardancy properties of the composites were investigated. The morphologies of fracture surfaces were characterized through scanning electron microscopy (SEM). And the thermal stability of the composites was studied by thermogravimetric analysis. The results show that the flow properties, the impact strength, the elongation at break, and the flame retardancy are improved with the proper addition of MWNT. The morphological behavior indicates the fracture surface of HIPS/MWNT is more roughness than that of HIPS. The addition of MWNT has little influence on the thermal stability of HIPS.

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