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18 May 1999 Photoinduced orientation of azobenzene liquid crystalline side chain homopolymers
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A simple casting film of Poly(6-[4-(4- cyanophenyl)diazenylphenyl oxy] hexyl methacrylate) (PM6ABCN) was made on an untreated surface of a glass substrate and adopted as a typical sample to study photoinduced orientation of azobenzene liquid crystalline side chain homopolymers. Below Tg and after irradiation of light at 366 nm, 400 nm, and 436 nm, respectively, the same;l shows different UV spectra which can give an expedition on the steady state of the photoinduced orientation. Under various conditions photoinduced orientation of PM6ABCN was examined, and results show that the orientation process is not only dependent on the light strength, but also on the temperature and the wavelength of polarized light used. The maximum extent of orientation below Tg can be obtained within 100 s under irradiation of polarized light of 20 mW/cm2 at 400 nm, and irradiation at 366 nm causes a lower extent of orientation than that by irradiation at 400 nm and 436 nm because relative more cis isomer was produced in the steady state.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jie Liu, Qijin Zhang, Yiliang Wu, and Tomiki Ikeda "Photoinduced orientation of azobenzene liquid crystalline side chain homopolymers", Proc. SPIE 3623, Organic Photonic Materials and Devices, (18 May 1999);

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