Abstract
Abstract Polyamic acid derivatives containing photosensitive azobenzene units in their main chain have been synthesized. Y type polyamic acid LB films were fabricated which were then converted into the polyimide LB films by chemical imidization accompanied by the elimination of long alkyl amines. The orientation of the polymer chains to the dipping direction was observed by the orientation of the chromophore in the plane direction, which depends strongly on the structure of the diamines. Aromatic diamines lead to a preferential orientation parallel to the dipping direction, while aliphatic diamines did not result in a preferential orientation. The reversible photo-isomerization was caused by both the polyamic acid and polyimide LB films. The rigid aromatic polyimides showed less reactivity compared with the more flexible aliphatic polyimides.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
