1993
DOI: 10.1246/cl.1993.657
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Effect of Cold-drawing on the Carbonization of Polyimide Films

Abstract: Kapton-type polyimide films that were cold-drawn at the stage of polyamic acids were carbonized. Electrical conductivity of the carbonized films increased proportionally with the draw ratio from 70 S/cm for the undrawn films up to almost 200 S/cm for the 70% drawn films.

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Cited by 10 publications
(3 citation statements)
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“…It is expected that utilization of polyamide carbonization and graphitization. 4,5,9,10 As a reacid alkyl ester as a precursor, instead of polyamsult, we found that when imidization of a polyamide acid, would give a polyimide film with higher ide acid film was carried out as fixed on a glass orientation of the molecules along the film sursubstrate, high quality graphitized film could be face, because polyamide acid alkyl ester imidizes by losing alcohols, which are larger molecules than water molecules.…”
Section: Introductionmentioning
confidence: 90%
“…It is expected that utilization of polyamide carbonization and graphitization. 4,5,9,10 As a reacid alkyl ester as a precursor, instead of polyamsult, we found that when imidization of a polyamide acid, would give a polyimide film with higher ide acid film was carried out as fixed on a glass orientation of the molecules along the film sursubstrate, high quality graphitized film could be face, because polyamide acid alkyl ester imidizes by losing alcohols, which are larger molecules than water molecules.…”
Section: Introductionmentioning
confidence: 90%
“…Especially, carbonization and graphitization of PI were extensively studied because of the molecular design flexibility of PI. The effects of chemical structure of PI [4], cold-drawing of PI film [5][6][7], and constraint during imidization of poly(amide acid) [8] on carbonization and graphitization have been extensively reported on the Kapton type PI, PI(PMDA/ODA) [9], and other PI films [10][11][12][13][14]. It was also revealed that carbonization of PI films give microporous carbon films by thermally treating PI films at 700-900 °C [15,16].…”
Section: Introductionmentioning
confidence: 99%
“…Aromatic polyimides’ high thermal stability, chemical inertness, and insulating behavior enables varied applications in the fields of aerospace and electronics. Furthermore, aromatic polyimides exhibit efficient and controllable carbonization behavior . Investigations of conversion of polyimides into carbon have primarily involved Kapton, a commercially available PMDA-ODA fully aromatic polyimide; however, researchers have explored the carbonization of many different polyimide backbones in thin film form. , During anaerobic thermal treatments, which induce pyrolysis, many aromatic polyimides avoid cracking or foaming and preserve the original shape . The resulting glassy or graphitic carbons displayed improved electrical conductivity, thermal stability, and modulus compared to the starting polyimide.…”
mentioning
confidence: 99%