Title :
Light-Induced Properties in Polyimides Containing Side Azobenzene Groups
Author :
Bruma, M. ; Schulz, B. ; Stumpe, J.
Author_Institution :
Petru Poni Inst. of Macromolecular Chemistrv, Iasi
Abstract :
A series of new photosensitive polymers have been synthesized by polycondensation reaction of diamines containing azobenzene moieties with hexafluoroisopropylidene diphthalic anhydride or with a diacid chloride containing hexafluoroisopropylidene or dimethylsilane. These amorphous polymers have good solubility in organic solvents and good film forming properties. The irradiation of polymer films with linearly polarized UV-Vis light causes a reorientation of the azobenzene groups by angular-selective E/Z photoisomerization. Thus, optical anisotropy is induced in the initially isotropic films. The photoinduced dichroism in the films has been measured and the results are discussed with respect to the polymer structure
Keywords :
optical films; optical polymers; polymer films; UV-Vis; amorphous polymers; azobenzene groups; azobenzene moieties; diacid chloride; diamines; dimethylsilane; diphthalic anhydride; hexafluoroisopropylidene; irradiation; isotropic films; optical anisotropy; organic solvents; photoinduced dichroism; photoisomerization; photosensitive polymers; polycondensation reaction; polyimides; polymer films; polymer structure; Anisotropic magnetoresistance; Argon; Geometrical optics; Optical films; Optical materials; Optical polarization; Optical polymers; Polyimides; Polymer films; Solvents; Polyimides; azobenzene polymers; photoorientation; poly(imide-amide)s; polyamides;
Conference_Titel :
International Semiconductor Conference, 2006
Conference_Location :
Sinaia
Print_ISBN :
1-4244-0109-7
DOI :
10.1109/SMICND.2006.283996
