Publication: Preparation and photoinduced isomerization study of a homopolymer and a copolymer based on 4′-(6-acryloxy)hexyloxy-4-methoxyazobenzene and acrylic acid
Issued Date
2003-12-15
Resource Type
ISSN
0887624X
Other identifier(s)
2-s2.0-0346991413
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Polymer Science, Part A: Polymer Chemistry. Vol.41, No.24 (2003), 4017-4024
Suggested Citation
Pattrawin Kasemjit, Toemsak Srikhirin, Boonsong Sutapun, Sauvarop Bualek-Limcharoen Preparation and photoinduced isomerization study of a homopolymer and a copolymer based on 4′-(6-acryloxy)hexyloxy-4-methoxyazobenzene and acrylic acid. Journal of Polymer Science, Part A: Polymer Chemistry. Vol.41, No.24 (2003), 4017-4024. doi:10.1002/pola.10954 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/20948
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Title
Preparation and photoinduced isomerization study of a homopolymer and a copolymer based on 4′-(6-acryloxy)hexyloxy-4-methoxyazobenzene and acrylic acid
Abstract
The synthesis and characterization of a copolymer based on 4′-(6-acryloxy)hexyloxy-4-methoxyazobenzene (MAB6) and acrylic acid (AA) are reported. A reaction was carried out by free-radical polymerization, yielding an MAB6 homopolymer and an AA-MAB6 copolymer with an MAB6 concentration of 16-80%. A nematic phase was observed in the copolymer when the MAB6 content was 44% or higher. Both nematic and smectic phases were observed in the MAB6 homopolymer. All of the polymers were investigated for trans-cis-trans isomerization in a solid film. The samples were irradiated with nonpolarized ultraviolet light (385 nm) before absorption measurements were taken with an ultraviolet-visible spectrometer. The copolymer and homopolymer exhibited a thermal cis-trans isomerization, which could be described by a double-exponential relaxation process (fast and slow). The relaxation experiment suggested that the hydrogen bonding may have hindered the slow process but had no effect on the fast process. A film of a copolymer sample with a high MAB6 content could be optically aligned by the exposure of the sample to polarized light (385 nm).