Synthesis and Mesomorphic Properties of Main-Chain Polymers Containing V-Shaped Bent-Core Mesogens with Acute-Subtended Angle
SCIE
SCOPUS
- Title
- Synthesis and Mesomorphic Properties of Main-Chain Polymers Containing V-Shaped Bent-Core Mesogens with Acute-Subtended Angle
- Authors
- Choi, EJ; Kim, EC; Ohk, CW; Zin, WC; Lee, JH; Lim, TK
- Date Issued
- 2010-03-23
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Four achiral polymers with V-shaped bent-core mesogens in the main chain have been synthesized by polycondensation, and the effect of acute-angled central cores (Ar = 1,2-phenylene or 2,3-naphthylene) and lateral halogen substituents (X = For Cl) was studied. All polymers were only soluble in strong acids such as H(2)SO(4) and CF(3)CO(2)H. The solution viscosities were in the range of 0.31-0.81 dL/g. Although polymers contained a V-shaped bent-core mesogen with acute-angled configuration in their main chain, in general they were semicrystalline in the solid state and could form smectic C phases in the melt state. However, polymer with Ar/X = 1,2-phenylene/Cl was almost amorphous. Especially, polymer with Ar/X = 2,3-naphthylene/F formed a ferroelectric smectic C phase (SmCP(F)), possibly B7 phase: on ground state the spontaneous polarization was not zero (P(s) = 140 nC cm(-2)), and on applying tin triangular electric field a switching occurred by a collective rotation of the mesogens around the main chain axis.
- Keywords
- FERROELECTRIC LIQUID-CRYSTALS; VINYL END-GROUPS; ACHIRAL MOLECULES; MICRO-SEGREGATION; SOFT MATTER; BEHAVIOR; CHIRALITY; MONOMERS; 1,2-PHENYLENE; MESOPHASES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26406
- DOI
- 10.1021/MA902184S
- ISSN
- 0024-9297
- Article Type
- Article
- Citation
- MACROMOLECULES, vol. 43, no. 6, page. 2865 - 2872, 2010-03-23
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.