| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.457 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis and Optical Properties of Organo-Soluble Hyperbranched Polybenzthiazoles from A3 and B2 Monomers |
| 초록 | Although fused aromatic-heterocyclic rigid-rod polybenzazoles such as polybenzthiazole (PBZT), polybenzoxazole (PBO), and polybenzimidazole (PBI) possess excellent thermal and mechanical properties, as well as their optical and electronic characteristics, their inherent insolubility in common organic solvents hampers their applications.1 On the other hand, dendrimers and hyperbranched polymers are attracting a lot of attention due to their distinctly different properties compared to their linear counterparts.2 For example, they have better solubility and compared to their linear analogs. Due to the easiness in preparation, hyperbranched polymers are better suited for the practical applications. However, the synthesis of ABx monomers still involves several reaction sequences. To be even more practical synthesis of hyperbranched polymers, mass production with low cost is required so that hyperbranched polymers from commercially available A3 and B2 or A2 and B3 could be the most promising approach. In this case, control of reaction is key to prevent gelation. Thus, organo-soluble hyperbranched PBZTs were synthesized by self-controlled reaction using different monomer solubility in the reaction medium. Resulting PBZTs were soluble in most of aprotic solvents such as NMP, DMAc, DMF, DMSO, and etc. Although they are not protonated in basic solvent, their absorption maxima were blue-shifted due to kink structure of repeating units. However, their excited states are more stable than their linear counterparts indicating that hyperbranched structure could efficiently prevent excimer formation. References 1. Wolfe, J. E. Encyl. Polym. Sci. Technol. 1988, 11, 601 and references are there in. 2. Matthews, O. A.; Shipway, A. N.; Stoddart, J. F. Prog. Polym. Sci. 1998, 23, 1. |
| 저자 | 민정은1, 최자영1, Christopher B. Lyons2, Loon-Seng Tan3, 백종범4 |
| 소속 | 1충북대, 2Southwestern Ohio Council for Higher Education (SOCHE), 3Polymer Branch, 4US Air Force Research Lab (AFRL/MLBP) |
| 키워드 | Hyperbranched Polymer; Polybenzthiazole |
