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61
Poly(ethylene terephthalate)
(2001. 6. 8. / 2001. 9. 1. )
Effects of Plasma Surface Treatment on Electrical and Mechanical
Properties of Poly(ethylene terephthalate) Films
Kyung-Bum LimDuck-Chool LeeDepartment of Electrical Engineering,
Inha University
(Received June 8, 2001 / Accepted September 1, 2001)
Abstract : In this study, the electrical and mechanical
characteristics of PET films were analyzed after plasma
surfacetreatment. After plasma treatment, the surface potential
decay, surface resistivity, and dielectric property were
evaluatedto analyze the electrical insulating property, and the
tensile strength was measured as the mechanical characteristic.
When plasma treatment was conducted for less than 10 minutes, it
was found that the electrical insulating property was improved
through evaporation of low molecular weight materials and cleaning
of surface. However, for more than 10minutes, the insulating
property of plasma treated PET films was decreased due to excessive
discharge energy. The tensile strength was hardly changed by plasma
treatment.Key Words : PET films, plasma treatment, electrical
insulating property, mechanical characteristic
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To whom correspondence should be
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Journal of the KIIS, Vol. 16, No. 3, 200162
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Poly(ethylene terephthalate)
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-
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Journal of the KIIS, Vol. 16, No. 3, 200164
Fig. 1. Schematic diagram of corona discharge apparatus
(4192A, Hewlett Packard) 60 Hz10MHz . 10mm (Tinius Olsen, USA) 5
.
4.
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Fig. 2. Weight loss versus plasma treatment time of PET
films
Untreatment
10[min] treatment
20[min] treatmentFig. 3. SEM of plasma treated PET films
, (SEM) Fig. 3 .
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4.2.
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Poly(ethylene terephthalate)
, 16 3, 2001 65
Fig. 4. The effect plasma treatment time on surface potential
decay of PET films
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Fig. 5. Surface resistivity versus plasma treatment time of PET
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Journal of the KIIS, Vol. 16, No. 3, 200166
Fig. 6. Relative dielectric constant versus frequency of plasma
treated PET films
Fig. 7. Tensile strength versus plasma treatment time of PET
films
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.
1) M. Paci, F. P. La Mantia, Competition between degradation and
chain extension during processing of reclaimed poly(ethylene
terephthalate), Polym. Degrad. Stab., Vol. 61, pp. 417420,
1998.
2) Wei Chen, Thomas J. McCarthy, Chemical Surface Modification
of Poly(ethylene terephthalate), Mac- romolecules, Vol. 31, pp.
36483655, 1998.
3) L. Zhang, W. S. Chin, W. Huang, J. Q. Wang, In- vestigation
of the Surface Structures and Dynamics of Polyethylene
Terephthalate (PET) Modified by Fluorocarbon Plasmas, Surf.
Interface Anal., Vol. 28, pp. 1619, 1999.
4) T. Sakai, M. Nakao, S. Hoshino, M. Yumoto, Processing of
Polymer Surface by Low Pressure Discharge in Gases, T. IEE Japan,
Vol. 112-A, No. 8, pp. 718724, 1992.
5) J. Meichsner, M. Zeuner, B. Krames, M. Nitschke, R.
Rochotzki, K. Barucki, Plasma diagnostics for surface modification
of polymers, Surface and Coatings Technology, Vol. 98, pp.
15651571, 1998.
6) Kyung-Bum Lim, Duck-Chool Lee, Study of the Surface
Degradation Mechanism of an Epoxy Insu- lator Exposed to Water, J.
of the Korean Physical
-
Poly(ethylene terephthalate)
, 16 3, 2001 67
Society, Vol. 37, No. 1, pp. 4954, 2000.7) , , , , Epoxy , ,
Vol. 50C, No. 4, pp. 153 160, 2001.
8) Chen Jie-Rong, Wang Xue-Yan, Wakida Tomiji, Wettability of
Poly(ethylene Terephthalate) Film Treated with Low-Temperature
Plasma and Their Surface Analysis by ESCA, J. of Appl. Polym. Sci.,
Vol. 72, pp. 13271333, 1999.
9) Fabio Garbassi, Marco Morra, Ernesto Occhiello, POLYMER
SURFACE, John Wiley & Sons Ltd., pp. 223237, 1994.
10) J. R. Hooahan and A. T. Bell, Technique and Application of
Plasma Chemistry, Wiley-Interscience, pp. 328336, 1974.
11) R. C. Snogren, Handbook of Surface Preparation,
Palmerton, pp. 207220, 1974.12) 153, -, pp. 4 63, 1992.
13) Sudarshan, Surface Modification Technologies, Marel Dekker,
Inc., p. 318, 1989.
14) , , , , JIEE, Vol. 91, No. 2, pp. 8590, 1971.
15) , , , Vol. 30, No. 3, pp. 249253, 1992.
16) , Polyethylene Terephthalate , , Vol. 8, No. 3, pp. 316323,
1995.
17) Chi-Ming Chan, Polymer Surface Modification and
Characterization, Hanser Pub., pp. 14, 1994.
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