scholarly journals High Frequency Viscoelastic Properties of Nanocomposites with Carbon-base Nanofillers

2009 ◽  
Vol 35 (3) ◽  
pp. 121-128 ◽  
Author(s):  
Tetsuya KUNIZAWA ◽  
Qing-Qing NI
Keyword(s):  
High Frequency ◽  
Viscoelastic Properties

Role of Adhesion in Viscoelastic Properties of Rubber-Tire Cord Composites

1981 ◽  
Vol 54 (1) ◽  
pp. 72-90 ◽  
Author(s):  
D. C. Prevorsek ◽  
R. K. Sharma
Keyword(s):  
High Frequency ◽  
Viscoelastic Properties ◽  
Optimum Level ◽  
Adhesion Test ◽  
Rubber Composites ◽  
Mechanical Measurements ◽  
Rubber Tire ◽  
Composite Properties

Abstract Dynamic mechanical measurements have been carried out on samples of rubber and PET cord-rubber composites, with and without adhesive, as a function of strain amplitude, temperature, pretension, angle of strain application and time of cycling. The results show that mechanical loss and dynamic modulus depend on these variables as well as the presence and type of adhesive at the cord-rubber interface. Based on these results, we conclude that adhesion plays a significant role in the viscoelastic properties of a composite and it is an important factor along with the properties of components in the analysis of tire performance in terms of composite properties. This study clearly shows that the maximum adhesion may not be the optimum adhesion in tire technology. The most relevant question, i.e., the determination of the optimum level of adhesion for a specific tire, however, remains unanswered. The viscoelastic properties of the composites decrease with time of cycling but the rate of decrease depends upon the level of adhesion in the starting material. This result could be important in the development of a more realistic dynamic adhesion test. Attempts to use the viscoelastic experiments with small amplitude, high frequency strain to determine the onset of fracture in the composite specimen appears to be promising. Work is in progress to determine the potential of this method in the analysis of adhesion.

Viscoelastic Behaviors of Carbon Nanotubes-Filled Syndiotactic 1,2-Polybutadiene

2014 ◽  
Vol 488-489 ◽  
pp. 209-212
Author(s):  
Xiao Feng He ◽  
Hua Zhang ◽  
Tie Jun Ge ◽  
Jia Qi Sun
Keyword(s):  
Carbon Nanotubes ◽  
High Frequency ◽  
Viscoelastic Properties ◽  
Loss Modulus ◽  
Elastic Characteristic ◽  
Low Frequency ◽  
Sine Wave ◽  
Parallel Plates ◽  
Viscoelastic Behaviors ◽  
Phase Angles

The flow of syndiotactic 1,2-polybutadiene (s-PB) filled with carbon nanotubes (CNTs) nanocomposites behave quite differently from Newtonian fluid, they exhibit both viscous and elastic characteristic and are termed as viscoelastic fluid. The viscoelastic properties can be determined by a Rheometer. In this studies a parallel plates arrangement where the upper plate is being rotated/oscillated with a sine wave and the stress and phase angles were measured. From our study on syndiotactic 1,2-polybutadiene and its nanocomposites with carbon nanotubes (CNTs), the results show that for a fixed amplitude and temperature, the storage and loss modulus increase with the increase of frequency. At low frequency the s-PB/ CNTs nanocomposites melts behaved more like a viscous liquid and changed the behavior into more elastic at high frequency.

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