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논문 기본 정보

자료유형
학위논문
저자정보

고정길 (고려대학교, 고려대학교 대학원)

지도교수
윤호규
발행연도
2016
저작권
고려대학교 논문은 저작권에 의해 보호받습니다.

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Enhanced dielectric permittivity and conductivity are observed in Poly(ethylene-co-ethyl acrylate) (EEA) / low density polyethylene blend composites filled with multi-walled carbon nanotubes. Composites were prepared via a melt-blending process when the volume fraction of MWCNT was near the percolation threshold. Complex permittivity and related AC conductivity measurements in the frequency range between 10-1 and 107 Hz are presented filled with different amounts of MWCNT varying in the range between 0 and 4 wt.%. The percolation occurs at a threshold concentration between 0.4 and 0.8 wt.% MWCNT. The differences in the dispersion of the MWCNT in the polymer matrix could be detected in the complex permittivity and AC conductivity spectra, and these differences have been explained by changes in blend compositions. The dielectric behavior and the impedance relaxation were investigated in a wide range of temperatures and frequencies. The complex impedance plot exhibited one impedance semicircle. Which indicates that the impedance response is a Cole-Cole-type relaxation.

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ABSTRACT
1. INTRODUCTION
2. EXPERIMENTAL
2-1. Raw Materials
2-2. Sample preparation
2-3. Measurement
2-3-1. Morphology
2-3-2. Electrical properties
2-3-3. Thermal properties
3. RESULTS AND DISCUSSION
3-1. Morphology
3-2. Elecrical conductivity
3-3. Dielectric constant and dielectric loss
3-4. Modeling approach: The Cole?Cole plot
3-5. Thermal properties
4. CONCLUSIONS
REFERENCES

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