The characteristics of polyimide photoalignment layer with chalcone derivatives produced by linear polarized UV light

Synthesis of Diamine Containing Chalcone Structure by Nitroammoniation and Aldol Condensation

“…In addition, polyamide acid ( PAA ), an intermediate product of synthesis, is easy to decompose and has unstable properties. It needs low temperature refrigeration and is difficult to transport and store [6,7] .…”

Epoxy Resins

“…324 Nematic liquid crystalline materials can be aligned homogeneously on a photoreactive polymer film when exposed to linearly polarized light. The rubbing method does not satisfy the recent demands for alignment quality.…”

Synthesis of dinitrochalcones by using ultrasonic irradiation in the presence of potassium carbonate

“…Photosensitive polyimides with side chain crosslinking groups have been widely used as polymeric photoresists in the field of microelectronics [1][2][3][4][5][6] and the polyimides containing chalcone moieties in the main chain have also been appeared as potential applications [7,8] due to their high sensitivity to UV irradiation and good chemical stability with a lower shrinkage. However, the traditional synthetic procedure for chalcone was performed by the Claisen-Schmidt condensation with a longer reaction period and a lower product yield in the presence of NaOH/RONa as a basic catalyst.…”