Molecular reorientation studies of ultra-violet light irradiated photosensitive polyimide films using two-dimensional infrared correlation spectroscopy

Title
Molecular reorientation studies of ultra-violet light irradiated photosensitive polyimide films using two-dimensional infrared correlation spectroscopy
Author(s)
이승우김유현[김유현]채복남[채복남]이태진김승빈[김승빈]정영미[정영미]
Keywords
LIQUID-CRYSTAL ALIGNMENT; AROMATIC POLYIMIDES; SIDE-CHAINS; DISPLAYS; BACKBONE; SEQUENCE; SURFACES; ANGLES; FTIR
Issue Date
201006
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MOLECULAR STRUCTURE, v.974, no.1-3, pp.30 - 34
Abstract
An organic solvent-soluble photosensitive polyimide (PSPI), bearing a cinnamate photoreactive moiety in its side group, was synthesized. The photochemical reactions of the PSPI in the films were investigated in detail using both UV-vis and IR spectroscopy, confirming that the cinnamate chromophores underwent photodimerization. Ultra-violet (UV) light irradiation of the polyimide thin films induced molecular reorientation of the chromophores as well as the main chain units. The molecular motions of the main chain units were induced by photoreaction before those of the photoreactive side groups in the UV irradiated films. Photo-induced molecular reorientation occurred in the following sequence: main chain photodimerization -> cinnamoyl chromophores. (C) 2009 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/22353http://dx.doi.org/10.1016/j.molstruc.2009.10.039
ISSN
0022-2860
Appears in Collections:
공과대학 > 화학공학부 > Articles
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