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  • 1
    Electronic Resource
    Electronic Resource
    Influence of static and cyclic compression on the electrical conductivity of FEF black-loaded rubbers (1989)
    Springer
    Polymer bulletin 22 (1989), S. 621-627 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The influence of static and cyclic compression on the temperature dependence of the electrical conductivity σ(T) of 100 phr FEF black-loaded rubber vulcanizates (SBR, NR, IIR, BR and NBR) has been studied. It was found that σ increases with static pressure for all rubber vulcanizates. The temperature coefficient of conductivity proved to be negative; its maximum value α ranges between −0.1 and −0.01 deg−1 depending upon the applied stress and type of rubber vulcanizate. The pressure coefficient of conductivity γ at room temperature varies with the static pressure from 0.78 to 0.04 (kg/cm2)−1. Menwhile, a was found to decrease with the number and stress amplitude of the cyclic compressions, while α increases with the number of compression cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00718944
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of some variables on the electroplating of zinc from acidic acetate baths (1994)
    Springer
    Journal of applied electrochemistry 24 (1994), S. 350-354 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electroplating of zinc onto steel substrates from baths containing zinc acetate and acetic acid has been investigated under different conditions of bath composition, current density, temperature and superimposed sinusoidal a.c. on d.c. A detailed study has been made of the influence of these variables on the potentiodynamic cathodic polarization, cathodic current efficiency and the throwing power of these baths. The surface morphology of the deposits was examined by scanning electron microscopy and crystal structure by X-ray.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00242065
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of the type of pre-torsional deformation on the creep rate of a silver-copper alloy (1983)
    Springer
    Journal of materials science 2 (1983), S. 144-145 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00735560
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation on the dependence of the electrical conductivity of FEF/SBR vulcanizates on the cyclic strain (1989)
    Springer
    Polymer bulletin 22 (1989), S. 413-420 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The constant deformation fatigue test was found to affect the electrical properties of 70 FEF/SBR vulcanizates. The conductivity of 70 FEF/SBR sample is so sensitive to the value of strain amplitude and the number of cycles. When the specimens were subjected to a large number of rapidly repeating strain cycles, the transverse conductivity, σT, shows an initial rapid fall with increasing number of cycles, probably due to carbon structure breakdown. This is followed by dynamic equilibrium, where the conductivity remains almost constant over the temperature range 30–85 °C. The equilibrium state between destruction and reconstruction of carbon black aggregates has been detected for all strains of certain values of strain cycles (1.2 × l05, 4.7 × 104, 4.7 × 104, and 1.7 × 104 cycles for 50%, 75%, 100%, and 130% strains, respectively).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263081
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  • 5
    Electronic Resource
    Electronic Resource
    Bidirectional torsion and dynamic recovery in aluminium-zinc-silicon alloy (1983)
    Springer
    Journal of materials science 2 (1983), S. 3-6 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00719941
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of tensile deformation on the electrical conductivity of SRF black-loaded SBR blend (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 42 (1991), S. 2879-2883 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Styrene butadiene rubber (SBR-1502) was mixed with 100 phr superreinforcing furnace (SRF) black. The obtained rubber vulcanizate was subjected to electrical conductivity measurements at different values of tensile deformation. The log V vs. log I graphs showed two distinct linear stages, the slope of which is nearly independent of the tensile deformation in the first stage and decreases with tensile deformation in the second stage. On the other hand, the tensile deformation was found to have an appreciable effect on the electrical conductivity. It decreases sharply as the sample is suddenly strained and then increases exponentially with time. An empirical formula describing this behavior is suggested.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070421103
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  • 7
    Electronic Resource
    Electronic Resource
    Thermal effects of heat-resistant rubber blends. I. Joule heating effects in carbon black-loaded NR/SBR blends (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 39 (1990), S. 1903-1913 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A heat-resistant rubber blend of natural rubber NR and styrene butadiene rubber (SBR-1502) was prepared according to the standard techniques. The rubber blend was loaded with different concentrations of LAMP black and general purpose furnace (GPF) black for obtaining conductive rubber composites. The obtained vulcanizates were subjected to electrical conductivity measurements over a wide range of temperature and electric field. It was found that all samples showed negative values of temperature coefficient of conductivity (TCC). The temperature developed inside the samples by the Joule heating effect was recorded as a function of time (T-t) at different values of the initial applied DC-electric power. The T-t dependence was found to obey an exponentially growing function with a time constant (τ), which was found to be dependent on the concentrations as well as the type of carbon black and the value of the initial applied power. The current-voltage characteristics of the samples showed a negative resistance behavior after a characteristic voltage (V*). It was noticed that V* decreases as the carbon black concentration increases.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070390907
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of dynamic cyclic extension on the electrical conductivity of fast extrusion furnace (FEF) black loaded rubber vulcanizates (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 38 (1995), S. 257-261 
    Details
    ISSN: 0959-8103
    Keywords: electrical conductivity ; rubber ; extension ; dynamic strain ; vulcanizates ; fast extrusion furnace black ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The influence of dynamic cyclic extension on the electrcal conductivity (σ) of 100 parts FEF carbon black loaded rubber (NR and SBR) vulcanizates was studied. The conductivity showed an initial rapid decrease with increasing cyclic strain amplitude, indicating a probable breakdown of the carbon black structure, owing to the masking of carbon particles by insulating rubber layers.The conduction mechanisms in these composites in terms of both the number of strain cycles and the strain amplitude were also studied. In addition, the temperature coefficient of conductivity was calculated for different amplitudes. It was greatly affected by the magnitude of the strain amplitude.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1995.210380307
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of static and cyclic compression on the electrical conductivity of FEF black-loaded rubbers (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 45 (1992), S. 557-561 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070450319
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of pre-extension on the electrical conductivity of styrene-butadiene rubber loaded with FEF carbon black. I. Dependence on temperature and swelling (1983)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 119 (1983), S. 39-45 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde der Einfluß der Vordehnung auf die elektrische Leitfähigkeit von mit 70 Gew.-% FEF-Ruß gefülltem Styrol-Butadien-Kautschuk untersucht. Das anomale Verhalten der Leitfähigkeit, das sich als Minimum in der Leitfähigkeitskurve äußerte, begann bei Anniäherung an einen bestimmten charakteristischen Wert der Vordehnung zu verschwinden. Ferner zeigte sich, daß sich die Form der elektrischen Leitfähigkeits-Temperatur-Kurve mit zunehmender Vordehnung merklich ändert.Der Einfluß der Quellung in Kerosin auf das elektrische Leitvermögen bei konstanter Vordehnung wurde an denselben Proben untersucht.Zwischen der Abhängigkeit der elektrischen Leitfähigkeit von der Vordehnung und jener der Kerosinquellung des gefüllten SBR wurde eine Korrelation festgestellt.
    Notes: The effect of pre-extension on the electrical conductivity of SBR (1502) filled with 70 phr FEF carbon black was studied. The anomalous behaviour of conductivity, manifested as a minimum in the temperature dependence of the electrical conductivity curve began to disappear on approaching a certain characteristic value of pre-extension. Moreover, the shape of the electrical conductivity vs. temperature curve was found to change appreciably with increasing pre-extension.The effect of swelling in kerosene on the electrical conductance of the same samples at constant pre-extension was also studied.A correlation between the effect of both, pre-extension and swelling in kerosene on the electrical properties of SBR filled with 70 phr FEF carbon black was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1983.051190104
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