Observation and analysis of percolation behavior in carbon microcoils/silicone-rubber composite sheets

Katsuno, Takashi; Chen, X.; Yang, Shihao; Motojima, Seiji; Homma, Masato; Maéno, Takashi; Konyo, Masashi

doi:10.1063/1.2206701

Cited by 28 publications

(13 citation statements)

References 14 publications

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“…Processing variables (i.e., the type of filler, volume fraction of filler in the composite) and operating variables (i.e., strain amplitude, strain rate, frequency, and temperature of testing) have a significant effect on the dynamic properties of the polymers. 2 Recently, much attention is being focused on the applicability of new generation fillers like carbon silica dual-phase filler (CSDPF), 3 carbon nanotubes, 4 conductive carbon black, 5 and nano graphite. 6 Although there have been many studies on the effect of addition of conductive carbon black in elastomer matrices, no literature has been reported in CSM vulcanizates.…”

Section: Introductionmentioning

confidence: 99%

Relaxation behavior of conductive carbon black reinforced chlorosulfonated polyethylene composites

Nanda

Tripathy

2010

J of Applied Polymer Sci

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Dynamic mechanical analysis and dielectric relaxation spectra of conductive carbon black reinforced chlorosulfonated polyethylene (CSM) composites were used to study their relaxation behavior as a function of temperature and frequency, respectively. A marginal increase in glass transition temperature has been observed upto 30 phr carbon black filled polymer composite, beyond which it decreases, which has been explained on the basis of aggregation of filler particles in the polymer matrix. The strain dependent dynamical parameters were evaluated at dynamic strain amplitudes of 0.1-200%. The nonlinearity in storage modulus increases with increase in filler loading. It can be explained on the basis of filler-polymer interaction and aggregation of the filler particulates. The frequency dependent dynamical mechanical analysis has also been studied at frequency range of 0.1-100 Hz. The variation in real and complex part of impedance with frequency has been studied as a function of filler loading. The effect of filler loading on ac conductivity has been observed as a function of frequency. An increase in conductivity value has been observed with increase in filler loading. This can be explained on the basis of formation of conducting paths between filler particulates.

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Section: Introductionmentioning

confidence: 99%

Relaxation behavior of conductive carbon black reinforced chlorosulfonated polyethylene composites

Nanda

Tripathy

2010

J of Applied Polymer Sci

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“…It was found that the arraying of the CMC in the silicone rubber matrix resulted in a significant increase in the tactile sensitivity. [3][4][5] However, it is difficult to disperse CMC in various solvents and polymer matrices uniformly because of the unique morphology. We have pointed out that the grafting of polymers onto the surface is effective method for the destruction of aggregation of nanoparticles and entanglement of nanofibers.…”

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confidence: 99%

Grafting of Polymers onto Carbon Microcoil by Use of Carboxyl Groups on the Surface and Electric Properties of Conductive Composite Prepared from Silicone Rubber with the Polymer-Grafted Carbon Microcoil

Morohashi

Takahashi

Nishida

et al. 2007

Polym J

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ABSTRACT:Carboxyl groups were successfully introduced on carbon microcoil (CMC) surface by the treatment with nitric acid. The carboxyl group content increased with increasing reaction time and reached to 1.34 mmol/g after 10 h. Poly(ethylene glycol) (PEG) was grafted onto the CMC surface by the reaction of carboxyl groups with terminal hydroxyl groups of PEG in the presence of condensing agent such as N,N 0 -dicyclohexylcarbodiimide or Lewis acid catalyst such as scandium (III) trifluoromethanesulfonate. Carboxyl groups on CMC surface have ability to initiate the cationic polymerization of vinyl monomers, such as isobutyl vinyl ether and N-vinylcarbazole and the corresponding polymers were grafted onto the surface. By grafting of polymers onto the surface, the entanglement of CMC was effectively destroyed and polymer-grafted CMC uniformly dispersed in good solvents for grafted polymer and silicone rubber. The inductance, capacitance, and resistance of conductive composite prepared from polymer-grafted CMC responded to acetone vapor. The inductance of the composite from polymer-grafted CMC increased in acetone vapor, and returned to initial value when it was transferred into air. The capacitance and resistance of the composite decreased in acetone vapor, and returned to initial value when it was transferred into air.

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“…It was found that incorporation of carbon nanocoils in epoxy nanocomposites can enhance the mechanic properties of the epoxy nanocomposites [122][123][124][125]. Besides, the coiled CNT/silicone-rubber composites show high resistive sensitivity, relying on the densi-ty of the carbon nanocoil [126,127]. In addition, metal-coated carbon nanocoils can also display some properties different from the pristine coiled CNTs.…”

Section: Applicationsmentioning

confidence: 99%

Toroidal and Coiled Carbon Nanotubes

Liu¹,

Zhao²

2013

Syntheses and Applications of Carbon Nanotubes and Their Composites

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Observation and analysis of percolation behavior in carbon microcoils/silicone-rubber composite sheets

Cited by 28 publications

References 14 publications

Relaxation behavior of conductive carbon black reinforced chlorosulfonated polyethylene composites

Relaxation behavior of conductive carbon black reinforced chlorosulfonated polyethylene composites

Grafting of Polymers onto Carbon Microcoil by Use of Carboxyl Groups on the Surface and Electric Properties of Conductive Composite Prepared from Silicone Rubber with the Polymer-Grafted Carbon Microcoil

Toroidal and Coiled Carbon Nanotubes

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