Figures & data
Figure 1. IR (KBr) spectrum of monomer 3.
Figure 2. 1H NMR spectrum of monomer 3 in DMSO-d6.
Figure 3. DSC curve of monomer 3.
Figure 4. IR (KBr) spectra of azo-CPAE copolymers.
Figure 5. 1H NMR spectra of the polymers:(A) PAE-allyl20%; (B) PAE-azo20%; (C) PAE-allyl20%-azo20; (D)PAE-allyl20%-azo40%; (E) PAE-allyl20%-azo60%.
Figure 6. UV-vis spectra of azo-CPAE copolymers in DMF solution at 25 °C.
Figure 7. TGA curve of azo-CPAE copolymers in nitrogen.
Figure 8. DSC curves of PAE-allyl20%-azo20% heated at 250 °C for different time: 0, 20, 40 and 60 min.
Figure 9. DSC curves of PAE-azo20% before and after being heated at 250 °C for 60 min.
Figure 10. TGA curves of PAE-allyl20%-azo20% after being heated at 250 °C for different time (20, 40 and 60 min).
Figure 11. Typical behaviour of the photoinduced birefringence of PAE-allyl20%, PAE-allyl20%-azo20%, PAE-allyl20%-azo40% and PAE-allyl20%-azo60%: at point A, the writing laser was turned on; at point B, the writing laser was turned off; at point C, the circularly polarized light was turned on.
Figure 12. Typical behaviour of the photoinduced birefringence of PAE-allyl20%-azo20% before and after crosslinking.
Figure 13. Normalized photoinduced birefringence of PAE-azo20% before and after being heated at 250 °C for 60 min.
Scheme 1. Synthetic route of monomer 3.
Scheme 2. Synthesis routes to the polymers.
