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A series of azo polyurethanes bearing push-pull type azo chromophores was synthesized by post-polymerization azo-coupling reactions between a polyurethane precursor and diazonium salts of different aniline derivatives, respectively. Colloidal spheres with narrow size distributions were obtained by aggregation of these azo polyurethanes in DMF-H2O mixed solvents, which were induced by slowly increasing...
This study reveals the critical importance of dipole–dipole interaction for homopolymers to form self-assembled microspheres in solutions. For the polymers with different side-groups, the self-assembly is induced by gradually adding deionized water into their solutions in N, N-dimethylformamide (DMF). Three of the polymers containing side-groups with the strong dipoles form uniform colloidal spheres...
A series of epoxy-based azo polymers was synthesized from a precursor polymer that was obtained by step-polymerization between 1,4-cyclohexanedimethanol diglycidyl ether and aniline. The azo polymers were prepared by post-polymerization azo-coupling reactions of the precursor polymer with several diazonium salts to introduce azo chromophores bearing different electron-withdrawing groups. Photoinduced...
A series of diblock copolymers bearing strong push–pull azo chromophores and cholesteryl groups on the respective blocks was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization. The liquid crystal phase structure, microphase-separated morphology, and photoresponsive properties of the block copolymers were investigated by using DSC, POM, AFM, XRD and laser irradiation...
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