Rheological behaviour, mechanical properties and morphological aspects of thermoplastic polyurethane reinforced with multiwalled carbon nanotubes

2010 ◽  
Author(s):  
Pietro Russo ◽  
Domenico Acierno ◽  
Paola Spena ◽  
A. D’Amore ◽  
Domenico Acierno ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Thermoplastic Polyurethane ◽  
Rheological Behaviour ◽  
Multiwalled Carbon ◽  
Morphological Aspects

Electrical and mechanical properties of phenoxy/multiwalled carbon nanotubes multifilament yarn processed by melt spinning

2012 ◽  
Vol 82 (20) ◽  
pp. 2106-2115 ◽  
Author(s):  
Jonas Bouchard ◽  
Aurélie Cayla ◽  
Vincent Lutz ◽  
Christine Campagne ◽  
Eric Devaux
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Melt Spinning ◽  
Rheological Behaviour ◽  
Melt Flow Index ◽  
Flow Index ◽  
Electrical Measurements ◽  
Multiwalled Carbon ◽  
Multifilament Yarn

Nanocomposites based on Poly ((hydroxy ether) of bisphenol A) (Phenoxy) filled with multiwalled carbon nanotubes has been prepared by extrusion. Rheological behaviour and thermal degradation of these nanocomposites have been studied by melt flow index and thermogravimetric analysis. The results show that the addition of carbon nanotubes up to 2wt% increases the viscosity but does not modify significantly the spinnability of the compounds. Moreover, incorporation of these nanofillers allows an improvement of the thermal decomposition. In a second step, these nanocomposites have been processed by melt spinning to produce multifilament yarn. Transmission electron microscopy observations have been done to study carbon nanotubes dispersion and orientation. Nanocomposite morphology correlated with electrical measurements reveal an electrical percolation around 1.5 wt.% without decreasing significantly mechanical properties.

scholarly journals Enhanced mechanical properties of multiwalled carbon nanotubes/thermoplastic polyurethane nanocomposites

2019 ◽  
Vol 9 ◽  
pp. 184798041984085 ◽  
Author(s):  
P Kalakonda ◽  
S Banne ◽  
PB Kalakonda
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Composite Scaffold ◽  
Thermoplastic Polyurethane ◽  
Three Dimensional ◽  
Tensile Modulus ◽  
Polymer Nanocomposite ◽  
Polymer Chains ◽  
Multiwalled Carbon

Carbon nanotubes are considered to be ideal candidates for improving the mechanical properties of polymer nanocomposite scaffolds due to their higher surface area, mechanical properties of three-dimensional isotropic structure, and physical properties. In this study, we showed the improved mechanical properties prepared by backfilling of preformed hydrogels and aerogels of individually dispersed multiwalled carbon nanotubes (MWCNTs-Baytubes) and thermoplastic polyurethane. Here, we used the solution-based fabrication method to prepare the composite scaffold and observed an improvement in tensile modulus about 200-fold over that of pristine polymer at 19 wt% MWCNT loading. Further, we tested the thermal properties of composite scaffolds and observed that the nanotube networks suppress the mobility of polymer chains, the composite scaffold samples were thermally stable well above their decomposition temperatures that extend the mechanical integrity of a polymer well above its polymer melting point. The improved mechanical properties of the composite scaffold might be useful in smart material industry.

The Study on the Microstructures and High Performances of Melt Blending Polyurethane/Multiwalled Carbon Nanotubes Composites

2008 ◽  
Vol 16 (8) ◽  
pp. 509-518 ◽  
Author(s):  
Fengdan Jiang ◽  
Sizhu Wu ◽  
Yongji Wei ◽  
Liqun Zhang ◽  
Guohua Hu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Multiwalled Carbon Nanotubes ◽  
Microphase Separation ◽  
Thermoplastic Polyurethane ◽  
Melt Blending ◽  
Scanning Calorimetry ◽  
Multiwalled Carbon ◽  
High Temperature Tensile

A melt blending process was employed to prepare nanocomposites based on thermoplastic polyurethane (TPU) and multiwalled carbon nanotubes (MWNT). The content of MWNT filled in TPU was increased till 40 phr (parts per hundreds of rubber). The morphological, structural and mechanical properties of the resulting TPU nanocomposites were systematically investigated using scanning electron microscope (SEM), transmission electron microscope (TEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), dynamic mechanical thermal analysis (DMTA) and tensile testing. The results indicated that the unmodified MWNT were dispersed finely and uniformly in the TPU matrix beyond expectation, and the microphase separation structures of the TPU nanocomposites were slightly affected by the presence of MWNT. The mechanical properties of the TPU nanocomposites containing various amounts of MWNT at both room temperature and 120 °C were studied, which demonstrated that the modulus of TPU were greatly increased and the high temperature tensile strength of TPU was also prominently improved when MWNT content is higher. Moreover, the TPU nanocomposites exhibited improved thermal and electrical conductivities that might mean the TPU/MWNT nanocomposites have potential application as multifunctional materials.

Effect of Multiwalled Carbon Nanotubes On Mechanical Properties of Concrete

2012 ◽  
Vol 2 (6) ◽  
pp. 166-168 ◽  
Author(s):  
Dr.T.Ch.Madhavi Dr.T.Ch.Madhavi ◽  
◽  
Pavithra.P Pavithra.P ◽  
Sushmita Baban Singh Sushmita Baban Singh ◽  
S.B.Vamsi Raj S.B.Vamsi Raj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon

Thermal and mechanical properties of a nanocomposite of a photocurable epoxy-acrylate resin and multiwalled carbon nanotubes

2011 ◽  
Vol 528 (13-14) ◽  
pp. 4318-4324 ◽  
Author(s):  
Marcos N. dos Santos ◽  
Carlos V. Opelt ◽  
Fernando H. Lafratta ◽  
Carlos M. Lepienski ◽  
Sérgio H. Pezzin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Epoxy Acrylate ◽  
Thermal And Mechanical Properties ◽  
Multiwalled Carbon ◽  
Acrylate Resin ◽  
Epoxy Acrylate Resin
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