Synthesis,Characterization and Thermal-optic Properties of Azo Polyurethane Containing Chiral Unit

摘要

@@As a new type of photoelectric information functional materials, azo polymer is the hotspot of currently research. Azo polymer, which has a large number of important optical properties such as optical phase change, "orders the surface" performance, in light of the color and birefringence, optical grating surface ups and downs, has a prodiqious and potential value in applications in the domain of photonics communications and information storage and so on [1-2]. Also azopolymer can be applied to respond quickly to optical switches, electro-optical modulator and various optical storage devices. At present, polymer-based all-optical switching requires too much stronger light to drive, which infinited limiting the application of all-optical switching polymer material [3-4]. In recent years, poor light of all-optical polymer switching has become a research hotspot [5-7]. The material should have a preferable non-linearity performance to achieve a good all-optical switching, which requires the material has an excellent centre asymmetry. In the microscale, we designed the molecule containing central asymmetry through adhibit push-pull electronic group in the chromophore elements. In the macroscale, we designed and adhibited a chiral unit to achieve it[8].