Photocolorimetric analysis of the carbon black content of mass-colored nitron fibre

1979 ◽  
Vol 10 (4) ◽  
pp. 412-413
Author(s):  
M. G. Bol'shakova ◽  
T. A. Vasilenko
Keyword(s):  
Carbon Black ◽  
Carbon Black Content ◽  
Nitron Fibre

Research on Electrical Double Percolation of Carbon Black-Filled Cement-Based Composites

2011 ◽  
Vol 311-313 ◽  
pp. 201-204
Author(s):  
Hong Zhong Ru ◽  
Ran Ran Zhao
Keyword(s):  
Carbon Black ◽  
Cement Paste ◽  
Volume Fraction ◽  
Carbon Black Particle ◽  
Carbon Black Content ◽  
Percolation Behavior ◽  
Key Factor ◽  
Binder Ratio ◽  
Black Particle ◽  
Double Percolation

Electrical conductive carbon black-filled cement-based composites are significant as multifunctional structural materials. Double percolation in carbon black-filled cement-based composites involves both carbon black particle percolation and cement paste percolation, which has great effect on the resistivity of composites. Based on double percolation theory, the influences of sand-binder ratio and carbon black volume fraction on the resistivity of carbon black-filled cement-based composites are investigated. The results show that besides carbon black volume fraction, sand-binder ratio is a key factor affecting double percolation behavior in carbon black-filled cement-based composites. At a fixed carbon black content in overall mortar, with increasing sand-binder ratio, the cement paste percolation though aggregate phase increases due to high obstruction of aggregate but the carbon black particle percolation in cement paste decreases. This is because that the microstructure of aggregate is impenetrable so that the carbon black particles are limited in cement paste, that is, the carbon black content in paste is compacted and large amount of conductive paths are generated by lapped adjacent carbon black particles in paste. The double percolation in the electrical conduction in carbon black-filled cement-based composites is observed when the carbon black volume fraction is 7.5% and sand-binder ratio is 1.4, and its resistivity is only 3200 Ωcm, so that a sand-binder ratio of 1.4 and 7.5% carbon black volume fraction or more are recommended for attaining high conductivity with a compromise between workability and conductivity.

Ultrasonic Measurements with Rubber Compounds during Extrusion

1979 ◽  
Vol 52 (2) ◽  
pp. 294-303 ◽  
Author(s):  
R. Caspary ◽  
P. Kretschmer
Keyword(s):  
Carbon Black ◽  
Sound Velocity ◽  
Specific Volume ◽  
Carbon Black Content ◽  
Rubber Compounds ◽  
Ultrasonic Measurements ◽  
Temperature And Pressure ◽  
Reciprocal Value

Abstract The dependence of the Index of Elasticity, E, the reciprocal value of sound velocity, on temperature and pressure is related to specific volume and compressibility of rubbers. The sensitivity of E towards changes of temperature and pressure was calculated, indicating a new versatile possibility for the control of rubber extruders. To confirm this, extruder experiments were carried out with an SHR compound, of which a working diagram was established showing the complete behavior of E=f(p,T). The effect of compound composition, especially of plasticizer and carbon black content, was examined. Viscosity in the extruder primarily determines changes in E. The method was shown to be applicable up to a die diameter of at least 200 mm. The method may also be applied to follow degradation of rubber compounds during mastication.

scholarly journals Mechanical Properties of Carbon Black-Filled Polymeric Concrete

1996 ◽  
Vol 5 (4) ◽  
pp. 096369359600500
Author(s):  
L. Rejón ◽  
M.A. Ponce ◽  
G. Vazquez-Polo ◽  
V.M. Castaño
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Mechanical Performance ◽  
Carbon Black Content

Polymeric concrete, a recently patented material for electrical insulators, was modified by using various amounts of monomer in the resins employed and by adding different concentrarions of carbon black. The results show that there exists an optimal carbon black content in terms of the mechanical performance.

EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF MAGNETORHEOLOGICAL ELASTOMER

2016 ◽  
Vol 78 (5-4) ◽  
Author(s):  
Nurul Husna Rajhan ◽  
Hanizah Ab. Hamid ◽  
Azmi Ibrahim ◽  
Rozaina Ismail
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Carbon Black ◽  
Tensile Test ◽  
Magnetorheological Elastomer ◽  
Dead Load ◽  
Carbon Black Content ◽  
Engineering Applications ◽  
Magnetorheological Elastomers

Magnetorheological elastomers (MREs) have much interest in engineering applications. However, the mechanical properties of MREs are still under ongoing researches. This paper presents the results from tensile test, hardness and rebound test that were carried out in order to understand the mechanical properties of MRE with the influence of carbon black content. The addition of carbon black was varied with the amount of 20 pphr, 40 pphr and 60 pphr of carbon black. The development of the MRE composites was manufactured by following the conventional rubber compounding process. The optimum cure of each MRE composite was determined by using a Rheometer 100. The mechanical properties through tensile test were obtained by using an Instron Tensile Machine, meanwhile hardness and resilience were carried out by using Wallace Dead Load Hardness and Dunlop Tripsometer, respectively. The results of tensile strength were not consistent with the addition of carbon black. In meantime, hardness value increases as the carbon black increases. The decreasing pattern of MRE resilience could be observed when the carbon black content increases.

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