Synthesis And Photographic Orientation Of Side-chain Supramolecular Azo-containing Polymer Liquid Crystals

Azobenzene groups are a class of classical optically responsive functional groups Under a certain wavelength of ultraviolet light and heat,the azobenzene structure can be reversible cis-trans isomerization transition,and accompanied by the transition of geometric size,dipole moment,rigid physical and chemical properties.Azobenzene has a good rigidity in trans structures and is a good liquid crystal motif.Azobenzene groups have been extensively studied in many ways,such as designing and synthesising of new side-chain azobenzene polymer?investigateing the effects of different chemical composition and molecular structure on the photo-induced properties of the polymer?investigateing The liquid crystal properties of the polymer?studying the relationship between the microstructure and the photoresponsiveness of self-assembly in solution.In this paper,a new supramolecular azobenzene compound was designed and synthesized.The photoreactivity of supramolecular azo-containing liquid in solution was studied.The liquid crystal properties of supramolecular azobenzene compounds were further explored.On the basis of above research,Many of the programs are designed for the problem of azobenzene liquid crystal into the film is difficult and brittle.We designed and synthesized the liquid crystalline polymer of cardanol and azobenzene.its properties were exploredand and the supramolecular assembly were studied.The specific research contents in this paper are as follows:1.On the basis of the previous,we synthesis the supramolecules guest of 6-[[4-[(4-cyanophenyl)azo]phenoxy]hexyl-1-adamantanate ester with push-pull electron structure.The structure of the product was characterized by Fourier transform infrared spectroscopy(FT-IR)and 1H-NMR.The maximum absorption wavelength(?max)and UV response of the guest were investigated by UV-Vis spectroscopy(UV-Vis).The properties were examined by polarizing microscope(POM),DSC and other methods.2.Synthesis of mono-6-deoxy-6-aminoethyl-amino-?-CD by a series of reactions based on ?-CD.(6-aminoethylamino-6-deoxy)-?-CD-g-PAA host was prepared by grafting onto polyacrylic acid(PAA)polymer side chains.The structure of the product and its intermediates was characterized by Fourier transform infrared spectroscopy(FT-IR).3.The supramolecular self-assembly solution system and the corresponding coating were obtained by supramolecular self-assembly of the adamantylazo small molecule and PAA grafted ?-CD with DMF and DMSO as solvent.The structure of the product was characterized by Fourier transform infrared spectroscopy(FT-IR).The photo-orientation properties of supramolecular azo polymers were investigated by UV-Vis,polarizing microscope and photo-induced birefringence.4.Based on the analysis of the above experim,combined with the characteristics of cardanol to improve the program.We designed and synthesized casoxylazobenzene.And in the ultraviolet light to complete self-crosslinking film.The structure of the product and its intermediates was characterized by FT-IR.The properties of the films were investigated by UV-Vis and POM.5.In the study of cardanol azobenzene,we synthesized the cardanol acrylate monomer and made the copolymerization experiment with NIPAM.The three-dimensional network structure was obtained.At the same time,the super-molecular self-assembly experiments were completed.The structure of the product and its intermediates was characterized by FT-IR.The properties of the films were investigated by UV-Vis and POM.