Photoinduced bending behavior of cross-linked azobenzene liquid-crystalline polymer films with a poly(oxyethylene) backbone.
Cross-linked azobenzene liquid-crystalline polymer films with a poly(oxyethylene) backbone are synthesized by photoinitiated cationic copolymerization. Azobenzene moieties in the film surface toward the light source are simultaneously photoaligned during photopolymerization with unpolarized 436 nm light and thus form a splayed alignment in the whole film. The prepared films show reversible photoinduced bending behavior with opposite bending directions when different surfaces of one film face to ultraviolet light irradiation.
Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 220 Handan Road, Shanghai, 200433, China.
Jiu-an
JA
Lv
Weiru
W
Wang
Jixiang
J
Xu
Tomiki
T
Ikeda
Yanlei
Y
Yu
D001391:Azo Compounds / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry*; D058105:Polymerization / Q000528:radiation effects; D011108:Polymers / Q000737:chemistry*; D014466:Ultraviolet Rays
D001391:Azo Compounds; D002412:Cations; D011108:Polymers; C422409:liquid crystal polymer; D011092:Polyethylene Glycols; C009850:azobenzene
azobenzene; liquid-crystalline polymers; photoinitiated cationic polymerization; photo­induced bending