Concepedia

Poling Dynamics and Negligible Relaxation in Aromatic Polyurea Studied by In Situ Observation of Second-Harmonic Generation

Hisatoshi Nagamori, Kotaro Kajikawa, Hideo Takezoe, Atsuo Fukuda, Sadayuki Ukishima, Masayuki Iijima, Yoshikazu Takahashi, Eiichi Fukada

Japanese Journal of Applied Physics · 1992 · 13 citations · 6 references

DOI

Concepts

Abstract

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.

References

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