TITLE:
Thermal and Photo Alignment Behavior of Polyethylene Imine Having Methoxy Substituent Azobenzene Side Chain Group
AUTHORS:
Mohammad Kamruzzaman, Sun-nam Kim, Yutaka Kuwahara, Tomonari Ogata, Seiji Kurihara
KEYWORDS:
Azobenzene Polymer; Thermal Alignment Behavior; Liquid Crystalline Properties; Out-of-Plane Ordering
JOURNAL NAME:
Open Journal of Polymer Chemistry,
Vol.3 No.4,
September
18,
2013
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.