Electrical Conductivity of Cu-Powder Dispersed PMMA Composites Prepared by Solution-Cast

Ebihara, Yoshihide; Kunikyo, Nobuaki; Kanda, Masae; Ohyama, Ryuichiroh; Nishi, Yoshitake

doi:10.2320/jinstmet.74.712

Cited by 2 publications

(5 citation statements)

References 14 publications

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“…Therefore, volume electrical conductivity measurements were taken with a universal electron meter (MMAII-17A, Kawaguchi Electric Works, Tokyo) at room temperature in the box (P-601, Kawaguchi Electric Works, Tokyo). 10,11) Figure 2 illustrates the conductivity measurement setup. The sample was supported and contacted by ring and bottom of electrodes in the cylindrical seal container at room temperature.…”

Section: Sample and Its Electrical Resistivity Measurementmentioning

confidence: 99%

“…The sample was supported and contacted by ring and bottom of electrodes in the cylindrical seal container at room temperature. When S, R and t are the electrode contact area (m 2 ), electrical resistance of the sample (³), and sample thickness (m), the intrinsic electrical resistivity of the sheet material (µ/³ m) is expressed by the following equation: 10,11) µ ¼ SR=t ð1Þ…”

Section: Sample and Its Electrical Resistivity Measurementmentioning

confidence: 99%

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Electrical Conductivity Enhancement of PTFE (Teflon) Induced by Homogeneous Low Voltage Electron Beam Irradiation (HLEBI)

et al. 2012

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Electrical conductivity (·) enhancement, control, aging stability, and linear relation between · and reciprocal temperature (1/T) in PTFE (Teflon) had been examined by homogeneous low potential electron beam irradiation (HLEBI). Irradiations up to 0.432 MGy were found to raise the · of PTFE more than two orders of magnitude. In addition, control of electron movement or Fermi level by HLEBI on polymers seems possible since at low HLEBI levels up to 0.216 MGy, a strong dependence on · was observed. Aging stability investigation showed the saturated conductivities at 10 6 s (· s ) (2.5 © 10 ¹16 and 3.6 © 10 ¹15 S m ¹1 ) obtained at EB doses of 0.0432 and 0.432 MGy, respectively were approximately 4.9 and 70.6 times higher than · of untreated PTFE (5.1 © 10 ¹17 S m ¹1). Although the aging initially reduced the · of irradiated samples, · s were remarkably higher than the untreated. For example, the lower dose 0.0432 MGy samples decayed significantly, but its · s value (2.5 © 10 ¹16 S m ¹1) was still about 490% above untreated condition at 5.1 © 10 ¹17 S m ¹1. ESR (electron spin resonance) measurements showed aging for 10 6 s only slightly reduced the peak intensity of irradiated PTFE. This indicated the charge carriers generated did not easily decay. Results agree with the literature where PTFE was irradiated with VUV and radicals such as CF 3 + did not substantially decay with aging. Since the slopes of linear relationships between logarithmic electrical conductivity (ln ·) and reciprocal temperature (1/T) of all PTFE samples irradiated were approximately equal to that before treatment from 303 to 375 K, HLEBI didn't convert the · system. The small irradiation dose of 0.0432 MGy raised the electrical conductivity at room temperature. At higher temperatures above ³375 K, the 0.0432 and 0.432 MGy-HLEBI generated drops in conductivity ·. When unstable dangling bonds with isolated radicals at terminated sites are assumed to be formed in irradiated PTFE, the · recovery by heating to 424 K as well as high · of irradiated PTFE could be explained. HLEBI probably generated dangling bonds in the form of radicals acting as acceptors to carry charge. Since a chemical dopant was not needed to act as a charge carrier, HLEBI could probably be an attractive method to attain homogeneous doping of organic films.

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Section: Sample and Its Electrical Resistivity Measurementmentioning

confidence: 99%

Section: Sample and Its Electrical Resistivity Measurementmentioning

confidence: 99%

Electrical Conductivity Enhancement of PTFE (Teflon) Induced by Homogeneous Low Voltage Electron Beam Irradiation (HLEBI)

et al. 2012

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“…To evaluate change in bonding state in PMMA polymer reacted by acetone molecules, X-ray photoelectron spectroscopy (XPS; Quantum2000, ULVAC) analysis 11) was performed under XPS condition. The measurement area of Al target was 100 mm Â 100 mm.…”

Section: Sem Ftir Xps and Esr Measurementsmentioning

confidence: 99%

“…In addition, since both transparency and machinability with popularity of inexpensive poly-methyl methacrylic acid (acrylic resin, PMMA) are better than ABS polymer, the appropriate impact value of the appropriate conductive copper powder dispersed PMMA composites (PMMA-Cu) is expected. 11) Thus, the purpose of the present work is to obtain appropriate electric conductive PMMA-Cu composites with a moderated impact value for use with practical articles.…”

Section: Introductionmentioning

confidence: 99%

“…When the electron transfer at Cu-PMMA-Cu interfaces among copper particles ABS-Cu 9,10) Fig. 5 Relation between copper additions (V M ) and conductivity () of powder dispersed PMMA composites (PMMA-Cu), 11) together with Cu powder dispersed ABS composites (ABS-Cu). 9,10) is lower than that at Cu-ABS-Cu interface, it is explained that the conductivity of PMMA-Cu with copper addition from 16 to 50 vol%Cu is lower than that of ABS-Cu from 20 to 50 vol%Cu.…”

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High Electric Conductive PMMA Composites without Impact Value Decay by Dispersion of Copper Powder

et al. 2010

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Copper powder dispersed poly-methyl methacrylic acid (acrylic resin, PMMA) composites (PMMA-Cu) were prepared by the solution cast method. The Cu addition at the critical volume fraction (15:0 AE 1:0 vol%Cu) drastically enhanced the electric conductivity from the insulator (10 À14 Sm À1 ) to the electric conductor (10 5 Sm À1 ). The electric conductivity can be obtained by controlling the volume fraction of copper powders in PMMA polymers, as dilatation. The addition of 10 vol%Cu slightly enhanced the impact value of PMMA, whereas the remarkable decrease in the Charpy impact value was found at 25 AE 5 vol%Cu. The high conductive PMMA-Cu composites (from 15 to 20 vol%Cu) with high impact value (5:5 AE 0:5 kJm À2 ), which was higher than that of dispersed nylon6 composites (2 kJm À2 ) utilized for practical exteriors, were obtained without impact value decay by addition of small amount of copper powders.

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Electrical Conductivity of Cu-Powder Dispersed PMMA Composites Prepared by Solution-Cast

Cited by 2 publications

References 14 publications

Electrical Conductivity Enhancement of PTFE (Teflon) Induced by Homogeneous Low Voltage Electron Beam Irradiation (HLEBI)

Electrical Conductivity Enhancement of PTFE (Teflon) Induced by Homogeneous Low Voltage Electron Beam Irradiation (HLEBI)

High Electric Conductive PMMA Composites without Impact Value Decay by Dispersion of Copper Powder

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