Study of Carbon Black Structures in Rubber

1965 ◽  
Vol 38 (2) ◽  
pp. 387-399 ◽  
Author(s):  
A. R. Payne
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Dynamic Viscosity ◽  
Dynamic Modulus ◽  
Dynamic Testing ◽  
Degree Of Dispersion ◽  
Paraffin Oil ◽  
Oil Mixtures ◽  
Testing Techniques

Abstract The effect of carbon-black structures in rubber were studied using dynamic testing techniques. The aspects studied were the effects of the degree of vulcanization and the degree of dispersion on dynamic modulus and loss. Relationships were established between electrical conductivity and dynamic modulus, and between the maximum dynamic viscosity and the carbon-black modulus changes on oscillation. Finally, use was made of carbon-black/paraffin-oil mixtures as model materials in order to explain the effect of carbon-black structures on the modulus enhancement of carbon-black-loaded vulcanizates.

Effect of Dispersion on Dynamic Properties of Filler-Loaded Rubbers

1966 ◽  
Vol 39 (2) ◽  
pp. 365-374 ◽  
Author(s):  
A. R. Payne
Keyword(s):  
Carbon Black ◽  
Phase Angle ◽  
Dynamic Viscosity ◽  
Dynamic Modulus ◽  
Dynamic Properties ◽  
Mixing Time

Abstract Increased time of mixing carbon black-rubber vulcanizates reduces dynamic modulus and dynamic viscosity as well as phase angle at moderate amplitudes of oscillation. Changes in dynamic properties with mixing time are shown to be associated with dispersion of carbon black.

Dynamic Study of Reinforcement

1951 ◽  
Vol 24 (4) ◽  
pp. 787-809
Author(s):  
J. R. S. Waring
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Natural Rubber ◽  
Dynamic Modulus ◽  
Dynamic Compression ◽  
Compression Modulus ◽  
Dynamic Study ◽  
General Level ◽  
Temperature Range ◽  
Effects Of Temperature

Abstract The measurements were undertaken to obtain a better understanding of the mechanism of the reinforcement of rubber by carbon black. Results are given for the dynamic compression modulus and its temperature and amplitude coefficients, in the temperature range 30° to 70° C and at amplitudes of vibration around 0.0036 cm., for natural rubber, Neoprene Type GN, GR-S, and Perbunan. Data are also given on the effect of vibration and temperature on electrical conductivity. The results are discussed in relation to the general level of reinforcement. Evidence is given for the rupture of more than one type of cohesive bond in repeated cycles of vibration. A tentative system of analysis is proposed. The different effects of temperature and continuous vibration on dynamic modulus are attributed to a thixotropic breakdown in the case of vibration. The significance of such a “structure” dynamically hard at small amplitudes of vibration, is related to abrasion of tires in service.

Study of Dynamic Testing Techniques

2017 ◽  
Vol 7 (4) ◽  
pp. 322-330
Author(s):  
Avinash H. Hedaoo ◽  
◽  
Abha Khandelwal ◽  
Keyword(s):  
Dynamic Testing ◽  
Testing Techniques

Electrical conductivity and rheological properties of carbon black based conductive polymer composites prior to and after annealing

2021 ◽  
pp. 096739112110012
Author(s):  
Qingsen Gao ◽  
Jingguang Liu ◽  
Xianhu Liu
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Rheological Properties ◽  
Network Formation ◽  
Loss Modulus ◽  
Conductive Polymer ◽  
Complex Viscosity ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold

The effect of annealing on the electrical and rheological properties of polymer (poly (methyl methacrylate) (PMMA) and polystyrene (PS)) composites filled with carbon black (CB) was investigated. For a composite with CB content near the electrical percolation threshold, the formation of conductive pathways during annealing has a significant impact on electrical conductivity, complex viscosity, storage modulus and loss modulus. For the annealed samples, a reduction in the electrical and rheological percolation threshold was observed. Moreover, a simple model is proposed to explain these behaviors. This finding emphasizes the differences in network formation with respect to electrical or rheological properties as both properties belong to different physical origins.

Investigate of Electrical Conductivity of Shape-Memory Polymer Filled with Carbon Black

2008 ◽  
Vol 47-50 ◽  
pp. 714-717 ◽  
Author(s):  
Xin Lan ◽  
Jin Song Leng ◽  
Yan Ju Liu ◽  
Shan Yi Du
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Shape Memory ◽  
Shape Recovery ◽  
Volume Fraction ◽  
Shape Memory Polymer ◽  
Recovery Process ◽  
Thermomechanical Properties ◽  
Electrically Conductive ◽  
New System

A new system of thermoset styrene-based shape-memory polymer (SMP) filled with carbon black (CB) is investigated. To realize the electroactive stimuli of SMP, the electrical conductivity of SMP filled with various amounts of CB is characterized. The percolation threshold of electrically conductive SMP filled with CB is about 3% (volume fraction of CB), which is much lower than many other electrically conductive polymers. When applying a voltage of 30V, the shape recovery process of SMP/CB(10 vol%) can be realized in about 100s. In addition, the thermomechanical properties are also characterized by differential scanning calorimetery (DSC).

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