Advanced ultra-high molecular weight polyethylene/antioxidant-functionalized carbon nanotubes nanocomposites with improved thermo-oxidative resistance

2015 ◽  
Vol 132 (33) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nadka Tzankova Dintcheva ◽  
Rossella Arrigo ◽  
Cristian Gambarotti ◽  
Sabrina Carroccio ◽  
Serena Coiai ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Functionalized Carbon Nanotubes ◽  
Oxidative Resistance ◽  
Ultra High Molecular Weight

scholarly journals Orientation and Dispersion Evolution of Carbon Nanotubes in Ultra High Molecular Weight Polyethylene Composites under Extensional-Shear Coupled Flow: A Dissipative Particle Dynamics Study

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 154 ◽  
Author(s):  
Junxia Wang ◽  
Changlin Cao ◽  
Xiaochuan Chen ◽  
Shijie Ren ◽  
Yu Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Dissipative Particle Dynamics ◽  
Mean Square Displacement ◽  
Particle Dynamics ◽  
Distribution Functions ◽  
Coupled Flow ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight

The property of carbon nanotubes (CNTs)-based composites are significantly dependent on the orientation and dispersion evolution of CNTs in the polymer matrix. In this work, the dissipative particle dynamics (DPD) simulations are employed to discover the orientation and dispersion evolution of CNTs in ultra–high molecular weight polyethylene (UHMWPE) under extensional–shear coupled flow conditions for the first time. In this paper, we investigate the roles of the increasing extensional-shear coupled rate in morphology of CNTs/UHMWPE composites by varying CNTs concentration and observe that the system under consideration lies in the same evolution morphologies. When comparing our results for various morphologies, we notice that the orientation is affected more significantly by changing the extensional-shear coupled rates. A good alignment appears with an increase of extensional-shear coupled rates, which transform it into ordered morphology. In addition, a higher extensional-shear coupled rate does not necessarily contribute to better dispersion even though CNTs concentration varies, as shown by the mean square displacement (MSD) and the relative concentration distribution functions of CNTs in CNTs/UHMWPE composites.

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