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Polarized light‐induced anisotropy depending on polymer matrices studied by polarized ftir spectroscopy
Author(s) -
Tawa Keiko,
Kamada Kenji,
Sakaguchi Toru,
Ohta Koji
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991370115
Subject(s) - isomerization , polymer , fourier transform infrared spectroscopy , anisotropy , molecule , materials science , spectroscopy , polarity (international relations) , chemistry , polymer chemistry , photochemistry , chemical engineering , organic chemistry , optics , physics , biochemistry , quantum mechanics , cell , catalysis , engineering
Polarized‐light induced anisotropy of Disperse Orange 3 (DO3) depending on the polymer matrices was investigated by polarized FTIR spectroscopy. The dynamic behavior of the azo dyes doped in a series of methacrylate polymers was analyzed in terms of the orientation factors. Two factors, the free volume and the local polarity of matrices, are found to govern the dynamic behavior of DO3. It was found that induced anisotropy for trans and cis isomers varies depending on Tg of polymer matrix. Further, the thermal isomerization rate depend on the isomerization mode which is governed by the matrix polarity. The branched‐alkyl chains are considered to block the interaction between ester groups and DO3 and introduce the DO3 molecules into the less polar environment.