| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.134 |
| 발표분야 | 복합재료 |
| 제목 | Preparation of New Organoclays Compatible with Poly (Ethylene Terephthalate) (PET) for Exfoliated PET/organoclay Nanocomposite |
| 초록 | Polymer/clay nanocomposites have attracted the attention of academic and industrial researchers because they show significant improvements in various properties when compared to virgin polymers or conventional microcomposites. Poly (ethylene terephthalate) (PET) is a large volume plastic that has been used for fibers, bottles, films, and engineering plastics for many years. It is expected that PET can find more wide applications by incorporation of clay into PET matrix. For example, nano-dispersed clay in PET matrix decreases gas permeability and increasesthe modulus of PET, which impacts on applications of PET such as food packaging, reinforced tires and textile goods. In this study, we attempt to prepare new organoclay compatible with PET for exfoliated PET/organoclay nanocomposite by simple melt-mixing process. As a prerequisite, new organic modifier satisfying following two conditions is designed and synthesized: (1) it has a functional group compatible with PET and (2) it also has a thermally stable cationic group. As can be seen in XRD pattern of the organoclay, the shift in the (001) reflection to lower angle is obvious, indicating that the basal spacing of layered silicates is increased by intercalation of the organic modifier into the gallery of Na-MMT. In addition, TGA result clearly shows thermal decomposition temperature of the organoclay prepared in this study is significantly higher than that of commercially available organoclays (15A and 30B). The exfoliated structure of PET/organoclay nanocomposite is investigated by XRD and TEM. The employment of new organoclay having compatibility with PET and thermal stability give PET/organoclay nanocomposite with a high storage modulus. Not only the exfoliation of the layered silicates but also the interaction between the PET and organoclay is crucial for improving the mechanical properties of the PET nanocomposite. |
| 저자 | 김기홍, 김건형, 조원호 |
| 소속 | 서울대 |
| 키워드 | PET; organoclay; nanocomposite; exfoliated structure |
