| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.166 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Synthesis and Characterization of Novel Fluorine-containing Copoymers for Polymer-dispersed Liquid Crystals |
| 초록 | Polymer-dispersed liquid crystals (PDLCs) are dispersions of liquid crystal droplets in a polymer matrix. Currently, many applications of PDLC materials are based on their remarkable electro-optical properties and their high dielectric, optic, and magnetic anisotropies. In this study, a series of fluorine-containing copolymers, i.e., poly(acrylamide-co-fluorostyrene) with different fluorine content, was synthesized by reaction of acrylamide with 4-fluorostyrene in the presence of N,N'-azobisisobutyronitrile initiator, as shown in Scheme 1. The structures of the resulting copolymers were characterized by means of FT-IR, 1H NMR, and 13C NMR spectroscopy. The effect of hydrophobic moieties on the optical properties of nematic liquid crystal (NLC) composite films was also investigated. Fig. 1 shows FT-IR spectra of the copolymer, which exhibits characteristic absorption peaks at 1618, 1510, and 1454 cm-1 are due to the aromatic ring vibrations. The absorption peaks appearing at 1083 and 1665 cm-1 is attributed to the C-F and C=O groups, respectively. Contact angle of the copolymer films is decreased from 26 to 21o as the hydrophobic moieties increased. This can be attributed to NLC molecules are oriented with their nonpolar groups toward the hydrocarbon part of the polymer chains. Scheme 1. Synthesis of fluorine-containing copolymers. Fig. 1. FT-IR spectra of the copolymer. |
| 저자 | 김범용1, 박수진2 |
| 소속 | 1한국화학(연), 2화학소재연구부 |
| 키워드 | Fluorine; Copolymer; PDLC |
