Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties
Syntheses of novel liquid-crystalline polymers containing azobenzene moieties were performed by a convenient route with an acrylate backbone. The azobenzenes were key intermediates of the monomers, and side-chain liquid-crystalline polymers were prepared, that is, poly[α-(4-[(4-acetylphenyl)azo]phen...
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| Format: | Article |
| Language: | English |
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2002
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| Online Access: | http://psasir.upm.edu.my/id/eprint/114744/ http://psasir.upm.edu.my/id/eprint/114744/1/114744.pdf |
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| author | Silong, S. Lutfor, M.R. Ab Rahman, M.Z. Wan Yunus, W.M.Z. |
| author_facet | Silong, S. Lutfor, M.R. Ab Rahman, M.Z. Wan Yunus, W.M.Z. |
| author_sort | Silong, S. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Syntheses of novel liquid-crystalline polymers containing azobenzene moieties were performed by a convenient route with an acrylate backbone. The azobenzenes were key intermediates of the monomers, and side-chain liquid-crystalline polymers were prepared, that is, poly[α-(4-[(4-acetylphenyl)azo]phenoxy)alkyloxy]acrylates, for which the spacer length was 3 or 11 methylene units. In addition, poly[3(4-[(3,5-dimethylphenyl)azo]phenoxy)propyloxy]acrylate was prepared with a spacer length of 3 methylene units. The structures of the precursors, monomers, and polymers were characterized with Fourier transform infrared, 1H-NMR, and 13C-NMR techniques. The polymers were obtained by conventional free-radical polymerization with 2,2′-azobis-isobutyronitrile as an initiator. The phase-transition temperatures of the polymers were studied with differential scanning calorimetry, and the phase structures were evaluated with a polarizing optical microscopy technique. The results showed that two of the monomers and their corresponding polymers exhibited nematic liquid-crystalline behavior, and one of the monomers and its corresponding polymer showed smectic liquid-crystalline behavior. © 2002 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 86. |
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| format | Article |
| id | upm-114744 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:22:54Z |
| publishDate | 2002 |
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| spelling | upm-1147442025-01-28T04:48:21Z http://psasir.upm.edu.my/id/eprint/114744/ Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties Silong, S. Lutfor, M.R. Ab Rahman, M.Z. Wan Yunus, W.M.Z. Syntheses of novel liquid-crystalline polymers containing azobenzene moieties were performed by a convenient route with an acrylate backbone. The azobenzenes were key intermediates of the monomers, and side-chain liquid-crystalline polymers were prepared, that is, poly[α-(4-[(4-acetylphenyl)azo]phenoxy)alkyloxy]acrylates, for which the spacer length was 3 or 11 methylene units. In addition, poly[3(4-[(3,5-dimethylphenyl)azo]phenoxy)propyloxy]acrylate was prepared with a spacer length of 3 methylene units. The structures of the precursors, monomers, and polymers were characterized with Fourier transform infrared, 1H-NMR, and 13C-NMR techniques. The polymers were obtained by conventional free-radical polymerization with 2,2′-azobis-isobutyronitrile as an initiator. The phase-transition temperatures of the polymers were studied with differential scanning calorimetry, and the phase structures were evaluated with a polarizing optical microscopy technique. The results showed that two of the monomers and their corresponding polymers exhibited nematic liquid-crystalline behavior, and one of the monomers and its corresponding polymer showed smectic liquid-crystalline behavior. © 2002 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 86. 2002 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/114744/1/114744.pdf Silong, S. and Lutfor, M.R. and Ab Rahman, M.Z. and Wan Yunus, W.M.Z. (2002) Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties. Journal of Applied Polymer Science, 86 (11). pp. 2653-2661. ISSN 0021-8995; eISSN: 0021-8995 https://onlinelibrary.wiley.com/doi/10.1002/app.11123 10.1002/app.11123 |
| spellingShingle | Silong, S. Lutfor, M.R. Ab Rahman, M.Z. Wan Yunus, W.M.Z. Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title | Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title_full | Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title_fullStr | Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title_full_unstemmed | Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title_short | Synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| title_sort | synthesis and characterization of side-chain liquid-crystalline polyacrylates containing azobenzene moieties |
| url | http://psasir.upm.edu.my/id/eprint/114744/ http://psasir.upm.edu.my/id/eprint/114744/ http://psasir.upm.edu.my/id/eprint/114744/ http://psasir.upm.edu.my/id/eprint/114744/1/114744.pdf |