Premium
Preparation of new poly(ester‐imide)s with cyanoazobenzene side chains generating optical phase‐conjugate signals
Author(s) -
Sato Moriyuki,
Nakagawa Kazuo,
Tada Yuji,
Ujiie Seiji
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180402
Subject(s) - differential scanning calorimetry , imide , side chain , materials science , condensation polymer , polymer chemistry , conjugate , polymer , optical microscope , phase (matter) , chemistry , scanning electron microscope , organic chemistry , composite material , physics , mathematical analysis , mathematics , thermodynamics
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.