| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 복합재료 |
| 제목 | Crystallization behavior and properties of anionic LDH/PET nanocomposites |
| 초록 | In last decades, much of attentions have been concentrated to the study of nanocomposites built from inorganic layered materials and a polymer. Two important factors, dispersion of inorganic nanoparticles and compatibility between inorganic filler and organic polymer, could lead to a goal of improved properties such as mechanical property, thermal stability and gas permeability.[1] Several methods have been conducted for obtaining polymer nanocomposites with layered materials, i.e. solution intercalation, melt intercalation, and in-situ intercalation.[2-6] Among them, in-situ polymerization, swelling of the layers by the monomer followed by polymerization, is very effective on the dispersion of nanofillers. The chain growth in layers accelerates the layer exfoliation and nanocomposite formation. In this study, we describe a method for making PET nanocomposites with LDH by using in-situ polymerization. Then, the thermo-mechanical properties and the morphologies of PET nanocomposites were investigated. And crystallization behavior and morphological changes were investigated by using time-resolved SAXS study. The long period and amorphous region size decreased with increasing LDH content. Because PET/LDH nanocomposite can be crystallized more easily due to the nucleating effect of 2-dimensional LDH nanolayers, crystallinity of nanocomposite was increased, resulting in decreased amorphous region size. And average lamellar thickness for all nanocomposites are almost same regardless of LDH content, because lamellar thickness depends on not a nucleation but a molecular diffusion at a controlled temperature. Therefore, long period was decreased with increasing LDH nanofiller content due to the decreased amorphous size and unchanged lamellar thickness. References 1. S.S. Ray, M. Okamoto, Progress in Polymer Science, 2003, 28, 1539 2. H.B. Hsueh, C.Y. Chen, Polymer, 2003, 44, 1151 3. H.B. Hsueh, C.Y. Chen, Polymer, 2003, 44, 5275 4. J.H. Chang, k.M. Park, Polymer Engineering & Science, 2001, 41, 2226 5. R.A. Vaia, H. Ishiii, E.P. Giannelis, Advanced Materials, 1996, 8, 29 6. R.A. Vaia, K.D. Jandt, E.J. Kramer, E.P. Giannelis, Macromolecules, 1995, 28, 8080 |
| 저자 | 이완덕, 임승순 |
| 소속 | 한양대 |
| 키워드 | LDH; PET; nanocomposite; SAXS; synchrotron radiation |
