| 학회 |
한국고분자학회 |
| 학술대회 |
2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 |
30권 1호, p.66 |
| 발표분야 |
고분자 합성 |
| 제목 |
Synthesis and Polymerization of Self-Polymerizable Quinoxaline-Oxazole AB2 Monomer for All Aromatic Hyperbranched Polymer |
| 초록 |
A novel self-polymerizable AB2 monomer, 2,3-bis(3-amino-4-hydroxyphenyl)-6-carboxyquinoxaline dihydrochloride, was synthesized and polymerized to afford rigid hyperbranched polyphenylquinoxalineoxazole (PPQO) decorated with surface ortho-aminophenol. The resulting hyperbranched PPQO had an intrinsic viscosity of 1.04 dL/g (methanesulfonic acid, 30 ± 0.1 oC) determined by two-point method. The polymer displayed non-linear solution viscosity, so-called, inverse polyelectrolyte behavior in strong acidic solvent such as methanesulfonic acid, whereas it displayed linear solution behavior in basic solvent N-methyl-2-pyrrolidinone as function of concentration. The large numbers of end ortho-aminophenol functional groups were utilized for further chemical modification to afford various hyperbranched PPQOs with different functionalities. As like their linear analogues, the Tg’s of all surface modified polymers were not detected up to 450 oC by DSC. PPQO's had UV-absorption maxima near 377 nm in basic NMP and 448 nm in MSA. Its emission maxima were at 467 nm in NMP and 475.5 and 767 nm in MSA, respectively. |
| 저자 |
백종범1, Sharon R. Simko2, Loon-Seng Tan3
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| 소속 |
1충북대, 2Univ. of Dayton Research Institute, 3US Air Force Research Institute |
| 키워드 |
Hyperbranched Polymer; Inverse Polyelectrolyte Effect
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| E-Mail |
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