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Preparation of new poly(ester-imide)s with cyanoazobenzene side chains generating optical phase-conjugate signals

✍ Scribed by Moriyuki Sato; Kazuo Nakagawa; Yuji Tada; Seiji Ujiie

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 316 KB
Volume: 18
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.1997.030180402

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✦ Synopsis

Abstract

New semi‐rigid poly(ester‐imide)s with cyanoazobenzene side chains were prepared by melt polycondensation of a diethyl isophthalate derivative of cyanoazobenzene with N, N′‐dihexanols of five aromatic diimides in the presence of zinc acetate. Differential scanning calorimetry (DSC) measurements and polarizing microscope observations demonstrated that the polymers have glass transitions (T~g~) between 46 and 93°C and show no liquid crystalline (LC) properties. All poly(ester‐imide)s generated optical phase‐conjugate (PC) signals at high reflectivity by degenerate four‐wave mixing (DFWM) at low pump‐beam power.

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