Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline
Copolymer films of photoalignable liquid crystalline (LC) copolymethacrylates comprised of a phenyl benzoate mesogen connected with <i>N</i>-benzylideneaniline end moiety (NBA2) and benzoic acid (BA) side groups exhibit a photoinduced reorientation behavior. Significant thermally stimula...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/6/1408 |
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| author | Gento Nakajima Mizuho Kondo Moritsugu Sakamoto Tomoyuki Sasaki Hiroshi Ono Nobuhiro Kawatsuki |
| author_facet | Gento Nakajima Mizuho Kondo Moritsugu Sakamoto Tomoyuki Sasaki Hiroshi Ono Nobuhiro Kawatsuki |
| author_sort | Gento Nakajima |
| collection | DOAJ |
| description | Copolymer films of photoalignable liquid crystalline (LC) copolymethacrylates comprised of a phenyl benzoate mesogen connected with <i>N</i>-benzylideneaniline end moiety (NBA2) and benzoic acid (BA) side groups exhibit a photoinduced reorientation behavior. Significant thermally stimulated molecular reorientation attains a dichroism (<i>D</i>) greater than 0.7 for all copolymer films and a birefringence of 0.113–0.181. In situ thermal hydrolysis of the oriented NBA2 groups decreases the birefringence to 0.111–0.128. However, the oriented structures of the film are maintained, demonstrating a photo-durability, even though the NBA2 side groups photo-react. The hydrolyzed oriented films show higher photo-durability without changing their optical properties. |
| first_indexed | 2024-03-11T06:00:20Z |
| format | Article |
| id | doaj.art-834c49b357184d7f9eecc90232b36ff9 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T06:00:20Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-834c49b357184d7f9eecc90232b36ff92023-11-17T13:25:08ZengMDPI AGPolymers2073-43602023-03-01156140810.3390/polym15061408Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneanilineGento Nakajima0Mizuho Kondo1Moritsugu Sakamoto2Tomoyuki Sasaki3Hiroshi Ono4Nobuhiro Kawatsuki5Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, JapanDepartment of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, JapanJapan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0076, JapanJapan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0076, JapanJapan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0076, JapanDepartment of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, JapanCopolymer films of photoalignable liquid crystalline (LC) copolymethacrylates comprised of a phenyl benzoate mesogen connected with <i>N</i>-benzylideneaniline end moiety (NBA2) and benzoic acid (BA) side groups exhibit a photoinduced reorientation behavior. Significant thermally stimulated molecular reorientation attains a dichroism (<i>D</i>) greater than 0.7 for all copolymer films and a birefringence of 0.113–0.181. In situ thermal hydrolysis of the oriented NBA2 groups decreases the birefringence to 0.111–0.128. However, the oriented structures of the film are maintained, demonstrating a photo-durability, even though the NBA2 side groups photo-react. The hydrolyzed oriented films show higher photo-durability without changing their optical properties.https://www.mdpi.com/2073-4360/15/6/1408liquid crystalline polymerphotoalignmentphotoinduced reorientationbirefringent film<i>N</i>-benzylideneaniline |
| spellingShingle | Gento Nakajima Mizuho Kondo Moritsugu Sakamoto Tomoyuki Sasaki Hiroshi Ono Nobuhiro Kawatsuki Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline Polymers liquid crystalline polymer photoalignment photoinduced reorientation birefringent film <i>N</i>-benzylideneaniline |
| title | Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline |
| title_full | Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline |
| title_fullStr | Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline |
| title_full_unstemmed | Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline |
| title_short | Photo-Durable Molecularly Oriented Liquid Crystalline Copolymer Film based on Photoalignment of <i>N</i>-benzylideneaniline |
| title_sort | photo durable molecularly oriented liquid crystalline copolymer film based on photoalignment of i n i benzylideneaniline |
| topic | liquid crystalline polymer photoalignment photoinduced reorientation birefringent film <i>N</i>-benzylideneaniline |
| url | https://www.mdpi.com/2073-4360/15/6/1408 |
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