Molecular orientation and photocurrent of alkyl-aromatic polyimide films prepared by vapor deposition polymerization

Vapor deposition polymerization by a coevaporation of pyromellitic dianhydride and decamethylenediamine monomers has been employed for the preparation of polyamic acid as a precursor for polyimide films. By curing at temperatures of 200–250°C the polyamic acid became the polyimide with directional a...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 28; no. 12; pp. 2552 - 2555
Main Authors IIDA, K, NOHARA, T, TOTANI, K, NAKAMURA, S, SAWA, G
Format Journal Article
LanguageEnglish
Published Tokyo Japanese journal of applied physics 01.12.1989
Subjects
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
Polyimide
Vapor deposition
Molecular orientation
Photoelectric current
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Summary:Vapor deposition polymerization by a coevaporation of pyromellitic dianhydride and decamethylenediamine monomers has been employed for the preparation of polyamic acid as a precursor for polyimide films. By curing at temperatures of 200–250°C the polyamic acid became the polyimide with directional arrangement of the molecular chain in the normal to the substrate observed by wide-angle X-ray diffraction. The sample containing a large amount of oriented crystals showed a small photocurrent. It was concluded that the oriented chain containing a decamethylene moiety hinders the carrier transfer between pyromellitimide moieties, resulting in a decrease of current.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.28.2552