1991
DOI: 10.1002/app.1991.070430720
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Etch rate studies of base catalyzed hydrolysis of polyimide film. II

Abstract: SYNOPSISThe influence of a potassium carbonate ( K2C03) additive on the base catalyzed hydrolysis of polyimide ( Kaptont) film in aqueous potassium hydroxide (KOH) was determined experimentally. The etch rate is significantly greater for KOH/K2C03 solutions compared with solutions composed of KOH only. The experimental order of the reaction with respect to the KOH concentration was found to be 1.5. In addition, the rate was found to increase linearly with respect to the KzC03 concentration at a fixed KOH conce… Show more

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Cited by 13 publications
(13 citation statements)
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“…The coupling effect between C and F atoms decreased with the increase of the distance between the C and F atoms. For instance, C showed a stronger coupling effect with F than that of C. A full assignment of the resonances of the aromatic protons and carbons was assisted by the two‐dimensional COSY spectra, and these spectra agree well with the proposed molecular structures.…”
Section: Resultssupporting
confidence: 64%
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“…The coupling effect between C and F atoms decreased with the increase of the distance between the C and F atoms. For instance, C showed a stronger coupling effect with F than that of C. A full assignment of the resonances of the aromatic protons and carbons was assisted by the two‐dimensional COSY spectra, and these spectra agree well with the proposed molecular structures.…”
Section: Resultssupporting
confidence: 64%
“…In the 13 C NMR spectrum of 9FTA, most of the carbon atoms resonated in the region of 106–160 ppm. C and C showed clear quartet absorption at 131.1 and 123.4 ppm, respectively, probably because of the 2 J C–F and 1 J C–F coupling of the carbons with fluorine atoms in the tetraamine. The coupling effect between C and F atoms decreased with the increase of the distance between the C and F atoms.…”
Section: Resultsmentioning
confidence: 99%
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“…Later, Stoffel et al 15, 16 studied this chemical modification on Kapton H and Upilex S polyimide films by employing Rutherford backscattering and forward recoil spectrometry. The influence of a potassium carbonate base on the hydrolysis of polyimide has also been studied 17. Other wet chemical treatments reported include oxidation of polyimide by chromic acid and perchloric acid 7…”
Section: Introductionmentioning
confidence: 99%