Poling dynamics and negligible relaxation in aromatic polyurea studied by in situ observation of second-harmonic generation

The poling process has been observed by means of second-harmonic generation in aromatic polyurea prepared by vapor deposition polymerization. Polymerization from the as-grown oligomer and crystallization proceed simultaneously with an electric-field-induced alignment of the urea group at about 130°C...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1992, Vol.31 (5A), p.L553-L555
Main Authors: NAGAMORI, H, KAJIKAWA, K, TAKEZOE, H, FUKUDA, A, UKISHIMA, S, IIJIMA, M, TAKAHASHI, Y, FUKADA, E
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:The poling process has been observed by means of second-harmonic generation in aromatic polyurea prepared by vapor deposition polymerization. Polymerization from the as-grown oligomer and crystallization proceed simultaneously with an electric-field-induced alignment of the urea group at about 130°C. Consequently, the poled structure is thermally quite stable even at 200°C and shows negligible relaxation at room temperature.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.31.l553