High-quality and highly oriented graphite block from polycondensation polymer films
1992; Elsevier BV; Volume: 30; Issue: 2 Linguagem: Inglês
10.1016/0008-6223(92)90088-e
ISSN1873-3891
AutoresMutsuaki Murakami, Naomi Nishiki, Kiyoji Nakamura, J Ehara, Hiroshi Okada, Takashi Kouzaki, Kei Watanabe, Toshihiko Hoshi, S. Yoshimura,
Tópico(s)Polymer Nanocomposites and Properties
ResumoHigh-quality and highly oriented graphite was produced in the form of a thick block having physical properties close to those of single-crystal graphite. It was prepared from polyimide films of 25 μm thick with high molecular orientation. A sheaf of the films was heat treated in an argon atmosphere at temperatures up to 1000°C (carbonization) and then heated for graphitization up to 3000°C under a pressure between 100 and 300 kg/cm2. Graphite blocks as large as 150 × 50 × 13 mm3 were prepared, and the mosaic spread (the degree of preferred orientation) attained was 0.4°.
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