Morphology, crystallization, and mechanical properties of poly(ethylene terephthalate)/multiwall carbon nanotube nanocomposites viain situ polymerization with very low content of multiwall carbon nanotubes

2007 ◽  
Vol 104 (6) ◽  
pp. 3695-3701 ◽  
Author(s):  
Yang Wang ◽  
Jinni Deng ◽  
Ke Wang ◽  
Qin Zhang ◽  
Qiang Fu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Ethylene Terephthalate ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon Nanotube ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multiwall Carbon

From lab-scale film preparation to up- scale spinning fibre manufacturing of multiwall carbon nanotube/poly ethylene terephthalate composites

2017 ◽  
Vol 47 (6) ◽  
pp. 1241-1260 ◽  
Author(s):  
Effrosyni D Vogli ◽  
Ozlem Turkarslan ◽  
Sofia M Iconomopoulou ◽  
Deniz Korkmaz ◽  
Amaia Soto Beobide ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Carbon Nanotube ◽  
Ethylene Terephthalate ◽  
Multiwall Carbon Nanotube ◽  
Fibre Reinforcement ◽  
Nucleation Agent ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multiwall Carbon

Carbon nanotubes are among the stiffest and strongest fibres known and they are thus considered as ideal fillers for polymeric fibre reinforcement. Carbon nanotube polymer composites have consequently attracted huge academic and industrial interest with thousands of relevant research works being published every year. In current work, we present a quite integrated study of multiwall carbon nanotube (MWCNT)-reinforced poly ethylene terephthalate (PET) composites prepared at laboratory scale along with industrial melt-spun fibres. For an optimum dispersion of the nanomaterial in the polymer matrix, we proceeded to appropriate functionalization of multiwall carbon nanotubes. The morphology of the composites was inspected by scanning electron microscope and transmission electron microscope, while the physical properties, such as crystallinity and orientation, by differential scanning calorimetry, X-ray diffraction and Raman spectroscopy. The addition of well-dispersed carbon nanotubes acts as a nucleation agent increasing the crystallization of poly ethylene terephthalate matrix, however, decreasing the orientation of either films or fibres. Carbon nanotubes /poly ethylene terephthalate polymer composite films present an increment of Young’s modulus and tensile strength to detriment of failure strain; namely, stiffness is accompanied by a less ductile behaviour. With the addition of carbon nanotubes to poly ethylene terephthalate fibres, a decrease in shrinkage and only a slight improvement in dimensional stability was attained; this once more explains the slow growth of their commercial applications since the mechanical properties of these materials still remain a fraction of the expected theoretical values.

Development of Rubber Nanocomposites for Engineering Application

2016 ◽  
Vol 852 ◽  
pp. 61-65
Author(s):  
Paulraj Jawahar ◽  
Parthasarathy Kartheeswaran
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Natural Rubber ◽  
Engineering Application ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon Nanotube ◽  
Wide Range ◽  
Rubber Nanocomposites ◽  
Multiwall Carbon

Rubber finds wide range of application in automotive sector starting from tires to rubber bushes. Incorporation of nanoparticles like carbon nanotubes to rubber has improved the mechanical properties significantly. Still dispersion of carbon nanotube in raw rubber is a challenging process. In this work multiwall carbon nanotubes (MWCNT) are dispersed in the varying proportions (0.5, 1, 1.5 wt.%) in high viscous aromatic rubber processing oil using high shear planetary ball mill for a period of 2 hours. Then the rubber nanocomposites have been processed in double roll mill by adding the chemicals in the following order (Natural Rubber, Antioxidant: 1 phr, Oil: 5 phr, Zinc Oxide: 4 phr, Stearic Acid: 2 phr, Accelerator: 1 phr, Sulfur: 2 phr). It was found that, the incorporation of Multiwall carbon nanotube (MWCNT) has improved the mechanical properties of natural rubber significantly. Din abrasion studies show improvement in wear resistance of natural rubber incorporated with multiwall carbon nanotube.

Thermal conductivity and flammability of multiwall carbon nanotube/polyurethane foam composites

2016 ◽  
Vol 53 (2) ◽  
pp. 215-230 ◽  
Author(s):  
JJ Espadas-Escalante ◽  
F Avilés ◽  
PI Gonzalez-Chi ◽  
AI Oliva
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Polyurethane Foam ◽  
Fire Behavior ◽  
Multiwall Carbon Nanotubes ◽  
Propagation Speed ◽  
Interfacial Thermal Resistance ◽  
Multiwall Carbon Nanotube ◽  
Multiwall Carbon

The thermal conductivity and fire response of multiwall carbon nanotube/polyurethane foam composites are investigated for ∼45 kg/m3 foams with multiwall carbon nanotube concentrations of 0.1, 1, and 2 wt.%. The thermal conductivity of such nanocomposites shows a modest increase with increased multiwall carbon nanotube content, which is explained by a high value of interfacial thermal resistance, as predicted by existent thermal models. A strong correlation between multiwall carbon nanotube content, foam’s cellular morphology, and fire behavior was observed. The flame propagation speed increases with the addition of 0.1 wt.% multiwall carbon nanotubes and then reduces as the multiwall carbon nanotube content increases. The mass lost after flame extinction reduces with the addition of multiwall carbon nanotubes, suggesting an increased resistance to flame attack due the multiwall carbon nanotube presence.

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