Pyrolyzed, conducting kapton polyimide: An electrically conducting material

✍ Scribed by C. Z. Hu; J. D. Andrade

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 359 KB
• Volume: 30
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1985.070301116

✦ Synopsis

Polyimide was pyrolyzed in an argon atmosphere at 900°C for lh. The room temperature conductivity of the polyimide gradually increased from 15 to 100 S/cm with increased pyrolysis time. Further increase in the pyrolysis time did not increase the conductivity. X-ray photcelectron spectroscopy (XPS) showed that the polyimide changed from pure insulator to condudor; detailed XF' S spectra of carbon, nitrogen, and oxygen 1s bands showed no further elemental decomposition of the polyimide at 900°C. The high temperature treatment results in internal rearrangement to form a large, dense heterocyclic network. The film probably consists of tiny conductive particles dispersed in an amorphous carbon matrix. The polyimide is placed between two quartz plates during pyrolysis, the resulting film is flat, has uniform conductivity, is nonbrittle, has high chemical resistance, and shows better mechanical strength than films pyrolyzed in free-standing conditions.