| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.434 |
| 발표분야 | 기능성 고분자 |
| 제목 | Synthesis of MPEG ionomer and Prepartion of PHBHHx/MPEG-ionomer blend |
| 초록 | Poly(hydroxyalkanoates)(PHAs) are biodegradable polyesters synthesized by micro-organisms as carbon and energy reservoir and are divided into some kinds of families by substituted alkyl chains.1) Poly(3-hydroxybutyrate)(PHB) is the most popular PHAs materials in biodegradable plastics and biomedical products. But PHB has hard and brittle property than other PHAs owing to high crystallinity.2) In order to overcome these problems, copolymerization and blends with other compatible polymer has been tried. Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)(PHBHHx) is copolymer containing 3-hydroxybutyrate(3HB) and 3-hydroxyhexanoate(3HHx). It has some attractive properties, such as reduced crystallinity and increased flexibility compared to the PHB homopolymer. Moreover it has excellent compatibility with other biodegradable polymers. However PHBHHx, owing to 3HHx co-monomer unit, has lower crystallization rate than that of the PHB homopolymer. In the conventional engineering plastic process, such as injection molding, fast crystallization is necessary to improve process efficiency. Therefore nucleating agents are usually introduced into other polymers for acceleration of crystallization rate. Recently, the effects of ionomer Aclyn-Na and Surlyn-Na on the crystallization of PET have been discussed.3) it has been shown that two kinds of ionomer acted as nucleating agents. An ionomer is defined as an ion-containing polymer with a small amount of ionic groups along the back bone chains or as pendant groups. The ionic groups in an ionomer tends to aggregate into ionic domains, termed multipletes.4) These ionic structures have been shown to act as strong electrostatic cross-links resulting in the mechanical properties as well as act as nucleating agents.5),6) Mono-methoxy poly(ethylene glycol)(MPEG) is employed extensively in biomaterials and biomedical areas because of its hydrophilicity and is known to be miscible with PHAs.7) In this investigation, MPEG based ionomer is synthesized to apply these ionomer′s properties, such as enhancing mechanical properties and crystallization rate. In addition, the influence of ionomer on the PHBHHx/MPEG-ionomer blends is examined and discussed in detail. Reference 1. Yosiharu Doi, Shiro Kitamura and Hideki Abe, Macomolecules, 22, 4822, (1995) 2. Jing Li, W. John Kao, Biomacromolecules, 4 1055-1067, (2003) 3. Ying Yu, Yanllei Yi, Manna Jin, Haishan Bu, Macromol. Chem. Phys., 201, 1894, (2000) 4. Sang-Il-Han, Seung Soon Im, Dong Kuk Kim, Polymer, 44, 7165, (2003) 5. Forrest A. Landis and Robert B. Moore, Macromolecules, 33, 6031 (2000) 6. Y.T. Yoo, B.J. Lee, Sang-Il Han, S.S. Im, D.K. Kim, Polymer degradation stability, 79, 257, (2003) 7. Jing Li, W. John Kao, Macromolecules, 4, 1055, (2003) |
| 저자 | 임정섭, 임승순 |
| 소속 | 한양대 |
| 키워드 | PHBHHx; MPEG; ionomer |
