Effect of Bi-containing superconducting ceramic on the volume resistivity of butyl rubber composites

Dishovsky, Nikolay; El-Tantawy, Farid; Dimitrov, R.

doi:10.1016/s0142-9418(03)00063-1

Cited by 24 publications

(24 citation statements)

References 4 publications

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“…In one, the entire bulk of the polymer is conductive, while in the other, the conductive coating is applied to a nonconducting substrate. The bulk of the polymeric substrate can be made conductive by introducing carbon fibers [60], doping, and addition of other conducting materials [61]. To obtain a conductive coating on a polymer substrate, metal alloys such as tin oxide SnO [62], zinc oxide (ZnO) [62], and indium tin oxide (ITO) [63] are sputtered or plasma deposited.…”

Section: ) Centimeter and Millimeter Scale Substratesmentioning

confidence: 99%

Interdigital sensors and transducers

et al. 2004

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Section: ) Centimeter and Millimeter Scale Substratesmentioning

confidence: 99%

Interdigital sensors and transducers

et al. 2004

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“…More VA content means more interconnective pathways or conductive channels in matrix. And the increase of such pathways indicates easier current carrier motion, which could facilitate passage of current and reduce surface and volume resistivity of composites 30…”

Section: Resultsmentioning

confidence: 99%

Combined effect of VA content and pH level of filler on properties of EPDM/SmBO₃ and EPDM/ATO composites reinforced by three types of EVA

Chen

Zhang

et al. 2010

J of Applied Polymer Sci

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This study investigates the interaction of vinyl acetic (VA) content of ethylene-vinyl acetate (EVA), pH level of Samarium borate (SmBO 3 ), and Sb-doped SnO 2 (ATO) on reinforcement of peroxide-cured ethylene-propylene-diene rubber (EPDM)/SmBO 3 and EPDM/ ATO composites. It was found that EVA could both reinforce mechanical properties of EPDM, and enhance fluidity of gum during processing. During vulcanization, the interaction of VA groups and pH value of filler particles can influence the crosslink density of EPDM composites. In alkaline EPDM/SmBO 3 /EVA, VA groups could hydrolyze to produce polyvinyl alcohol and reduce pH level of medium by consuming OH À . When dispersed in acidic EPDM/ATO/EVA, VA groups could generate polyunsaturated bonds and acetic acid during vulcanization. The double bonds could react with dicumyl peroxide (DCP) and then boost crosslink efficiency of EPDM composites. Moreover, acetic acid and reduction of pH value could make DCP decompose into ions, and lower crosslink density of EPDM composites. In addition to the contribution of crosslink density, EVA could crystallize in EPDM composites to reinforce EPDM composites. Electric properties of EPDM were also affected. Surface and volume resistivity of EPDM composites decreased with the rise of VA content. As for EPDM/SmBO 3 /EVA composites, the growth of VA groups could boost dielectric constant and loss, decrease dielectric strength, due to the enhancement of polarity and reduction of crosslink density. In terms of EPDM/ATO/EVA composites, the EPDM/ ATO/EVA14 possesses the highest dielectric constant and loss, and the lowest dielectric strength, because of the competing effect of VA content and crosslink density.

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“…One of the important parameters characterizing the electrical properties of the composites is the temperature coefficient of resistivity (α). It was determined by the equation:6 where ρ T 1 and ρ T 2 are the volume resistivity at temperatures T 1 and T 2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The volume resistivity (ρ v ) of the NBR‐based composites was measured by a Terraohmmeter Teralin III (made in Germany) as a function of temperature and pressure 6. Resistivity to alternating current was obtained with an RLC Bridge (3535 Z Hitester, Hioki, Japan).…”

Section: Methodsmentioning

confidence: 99%

“…Polymers are used as insulators,3 but with suitable fillers their conductivity may be changed in a very wide range. In some cases the polymer matrix and the filler have a specific influence on composite conductivity 4–6. In recent years composites with resistances close to those of metals have been produced by compounding with high conductive fillers (carbon black, graphite, metal powder).…”

Section: Introductionmentioning

confidence: 99%

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Investigation of conductivity characteristics of nitrile butadiene rubber vulcanizates filled with semiconducting carbide ceramic

Todorova¹,

El-Tantawy²,

Dishovsky³

et al. 2006

J of Applied Polymer Sci

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SiC-and B 4 C-filled NBR rubber composites were prepared with various volume fractions of filler by a conventional roll-mill method. The morphological structures of the NBR-SiC and NBR-B 4 C composites were analyzed by scanning electron microscopy. The dependence of roomtemperature volume resistivity (r v ) on the concentration of filler in the two systems was studied. In addition, variation in the number of current carriers (n), mobility carriers (m), dielectric constant (e), and dielectric loss factor (tan d) on filler concentration in the two systems were investigated in detail. The applicability of composites as negative temperature coefficient (NTCR) linear thermistors was studied by the dependence of volume resistivity on temperature. The resistivity showed negative temperature dependence and changed linearly with temperature parallel. The conduction mechanism of the conductivity of the two composites was analyzed in terms of the computed activation energy and hopping energy. Change in volume resistivity as a function of frequency for the two systems was also investigated. Finally, the dependence of volume resistivity on applied pressure and possible real applications of these composites as transducers in pressure sensors were also studied.

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Effect of Bi-containing superconducting ceramic on the volume resistivity of butyl rubber composites

Cited by 24 publications

References 4 publications

Interdigital sensors and transducers

Interdigital sensors and transducers

Combined effect of VA content and pH level of filler on properties of EPDM/SmBO₃ and EPDM/ATO composites reinforced by three types of EVA

Investigation of conductivity characteristics of nitrile butadiene rubber vulcanizates filled with semiconducting carbide ceramic

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Effect of Bi-containing superconducting ceramic on the volume resistivity of butyl rubber composites

Cited by 24 publications

References 4 publications

Interdigital sensors and transducers

Interdigital sensors and transducers

Combined effect of VA content and pH level of filler on properties of EPDM/SmBO3 and EPDM/ATO composites reinforced by three types of EVA

Investigation of conductivity characteristics of nitrile butadiene rubber vulcanizates filled with semiconducting carbide ceramic

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Combined effect of VA content and pH level of filler on properties of EPDM/SmBO₃ and EPDM/ATO composites reinforced by three types of EVA