OJPChem  Vol.3 No.4 , November 2013
Thermal and Photo Alignment Behavior of Polyethylene Imine Having Methoxy Substituent Azobenzene Side Chain Group
ABSTRACT

Novel type of polyethylene imine having methoxy (OCH3) substituent azobenzene side chain group through eight methylene spacer group (PEI8M) was successfully synthesized and characterized by the polymer by 1H NMR, differential scanning calorimetry, polarized optical microscopic and X-ray diffraction analysis. Synthesized polymer possessed liquid crystalline (LC) properties. Spin coated PEI8M film showed out-of-plane molecular orientation on annealing and non-polarized visible light irradiation. PEI8M in solid film exhibited photoresponsive properties upon irradiation of UV and visible light. PEI8M film also exhibited reversible molecular orientation from random state to out-of-plane and from out-of-plane to random state on annealing, non-polarized UV and visible light irradiation.


Cite this paper
Kamruzzaman, M. , Kim, S. , Kuwahara, Y. , Ogata, T. and Kurihara, S. (2013) Thermal and Photo Alignment Behavior of Polyethylene Imine Having Methoxy Substituent Azobenzene Side Chain Group. Open Journal of Polymer Chemistry, 3, 92-98. doi: 10.4236/ojpchem.2013.34016.
References
[1]   K. Ichimura, “Photoalignment of Liquid-Crystal Systems,” Chemical Review, Vol. 100, No. 5, 2000, pp. 1847-1873. http://dx.doi.org/10.1021/cr980079e

[2]   T. Ikeda, “Photomodulation of Liquid Crystal Orientations for Photonic Applications,” Journal of Materials Chemistry, Vol. 13, No. 9, 2003, pp. 2037-2057. http://dx.doi.org/10.1039/b306216n

[3]   A. Bobrovsky, N. Boiko, V. Shibaev and J. Stumpe, “Comparative Study of Photoorientation Phenomena in Photosensitive Azobenzene-Containing Homopolymers and Copolymers,” Journal of Photochemistry and Photobiology A: Chemistry, Vol. 163, No. 3, 2004, pp. 347-358. http://dx.doi.org/10.1016/j.jphotochem.2004.01.021

[4]   B. Sapich, A. B. E. Vix, J. P. Rabe, J. Stumpe, G. Wilbert and R. Zentel, “Ordering and Dewetting in Spin-Coated Films of a Liquid Crystalline Main Chain Polymer,” Thin Solid Films, Vol. 514, No. 1, 2006, pp. 165-173. http://dx.doi.org/10.1016/j.tsf.2006.02.021

[5]   T. Uekusa, S. Nagano and T. Seki, “Highly Ordered In-Plane Photoalignment Attained by the Brush Architecture of Liquid Crystalline Azobenzene Polymer,” Macromolecule, Vol. 42, No. 1, 2009, pp. 312-318.

[6]   S. Ujiie and K. Iimura, “Thermal Properties and Orientational Behavior of a Liquid-Crystalline Ion Complex Polymer,” Macromolecules, Vol. 25, No. 12, 1992, pp. 3174-3178. http://dx.doi.org/10.1021/ma00038a024

[7]   S. Ujiie and K. Iimura, “Formation of Smectic Orientational Order in an Ionic Thermotropic Liquid-Crystalline Side-Chain Polymer,” Polymer Journal, Vol. 25, No. 4, 1993, pp. 347-354. http://dx.doi.org/10.1295/polymj.25.347

[8]   M. Kamruzzaman, Y. Kuwahara, T. Ogata, S. Ujiie and S. Kurihara, “Synthesis, Thermal, and Photo Alignment Behavior of Polyethylene Imines Having Nitro Substituent Azobenzene Side Chain Group,” Journal of Applied Polymer Science, Vol. 120, No. 2, 2011, pp. 950-959. http://dx.doi.org/10.1002/app.33138

[9]   S. Ujiie and K. Iimura, “Ammonium Halide Type Thermotropic Liquid-Crystalline Polyethyleneimines and Those Low-Mass Model Compounds,” Chemistry Letters, Vol. 19, No. 6, 1990, pp. 995-998. http://dx.doi.org/10.1246/cl.1990.995

[10]   S. Ujiie and Y. Yano, “Thermotropic and Lyotropic Behavior of Novel Amphiphilic Liquid Crystals Having Hydrophilic Poly(ethyleneimine) Units,” Chemistry Communications, Vol. 1, 2000, pp. 79-80.

[11]   J. Fabian and H. Hartmann, “Light Absorption of Organic Colarants,” Springer-Verlag, Berlin, 1980, pp. 32-79. http://dx.doi.org/10.1007/978-3-642-67587-4

[12]   A. Natansohn and P. Rochon, “Photoinduced Motions in Azo-Containing Polymers,” Chemical Reviews, Vol. 102, No. 11, 2002, pp. 4139-4175. http://dx.doi.org/10.1021/cr970155y

[13]   M. Z. Alam, T. Ohmachi, T. Ogata, T. Nonaka and S. Kurihara, “Photoisomerization Behavior and Photoinduced Surface Relief Gratings on Azopolymer Film by a Monochromatic Light Irradiation,” Optical Materials, Vol. 29, No. 4, 2006, pp. 365-370. http://dx.doi.org/10.1016/j.optmat.2005.10.005

[14]   M. Ishiguro, D. Sato, A. Shishido and T. Ikeda, “Bragg-Type Polarization Gratings Formed in Thick Polymer Films Containing Azobenzene and Tolane Moieties,” Langmuir, Vol. 23, No. 1, 2007, pp. 332-338. http://dx.doi.org/10.1021/la061587j

[15]   D. Rais, Y. Zakrevskyy, J. Stumpe, S. Nespurek and Z. Sedláková, “Photoorientation of Azobenzene Side Groups in a Liquid-Crystalline Polybutadiene-Based Polymer,” Optical Materials, Vol. 30, No. 8, 2008, pp. 1335-1342. http://dx.doi.org/10.1016/j.optmat.2007.07.001

 
 
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