Cybotactic nematic phase in main-chain polyesters with bent-core mesogens
- Authors
- Choi, E-Joon; Seo, Young-Ho; Kamal, Tahseen; Park, Soo-Young; Watanabe, Junji
- Issue Date
- 10-Apr-2014
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Synthesis of liquid crystalline polymers; Bent-core mesogen; Cybotactic nematic phase
- Citation
- POLYMER, v.55, no.8, pp 1931 - 1939
- Pages
- 9
- Journal Title
- POLYMER
- Volume
- 55
- Number
- 8
- Start Page
- 1931
- End Page
- 1939
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26940
- DOI
- 10.1016/j.polymer.2014.02.050
- ISSN
- 0032-3861
1873-2291
- Abstract
- New six main-chain polyesters containing bent-core rnesogens with various central units (Ar = 1,2-or 1,3-phenylene and 1,6-, 1,7-, 2,3-or 2,7-naphthylene) were synthesized. All of the polymers were soluble in a mixture of phenol/p-chlorophenol/TCE (25/40/35 w/w/w). The inherent viscosities were in the range of 0.18-0.38 dl./g. Despite the existence of bent-core mesogens eliciting a remarkable diminution of molecular packing, polymer with Ar = 2,7-naphthylene formed a smectic phase, and polymers with both Ar = 1,2-phenylene and 2,3-naphthylene formed nematic phases. Moreover, most of the polymers were distinctly semi-crystalline. Herein, we report our findings regarding the first detection of cybotactic groups from the nematic phases of main-chain polyesters with bent-core mesogens. (c) 2014 Published by Elsevier Ltd.
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