Polyamide acid was prepared from pyromellitic dianhydride (PMDA) and p-phenylenediamine (PDA) and was then reacted with NaH and methyl iodide to transform into methyl ester having various degrees of esterification. Polyamide acid methyl ester was also prepared by the polymerization between PDA and a
Carbonization and graphitization of BPDA/PDA polyimide films: effect of structure of polyimide precursor
โ Scribed by T. Takeichi; Y. Eguchi; Y. Kaburagi; Y. Hishiyama; M. Inagaki
- Book ID
- 118519087
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 411 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0008-6223
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๐ SIMILAR VOLUMES
## Abst~et-Polyimide films "Novax" consisting of the imide part with the bridging part of a random mixture of two different structures, were carbonized at various temperatures up to 1100ยฐC and graphitized at 3000ยฐC. The weight change occurred in two steps, as other polyimide films; large weight de
Polyamide acid was prepared from pyromellitic dianhydride and p-phenylenediamine and was then reacted with NaH and various kinds of alkyl halides to transform into alkyl esters. The cast films were imidized as fixed on glass substrate to give polyimide films and were then carbonized by heating to 90