| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 |
20권 2호, p.2488 |
| 발표분야 |
신진연구자 심포지엄 |
| 제목 |
Graphene/Polyolefin Nanocomposites prepared via in-situ Polymerization with Multilayer Graphene-Supported Single-Site Catalysts |
| 초록 |
Carbon-based nanomaterial such as multilayer graphene (MLG) was used as catalyst support and nanofillers for ethylene or propylene polymerizations. The MLG-supported (n-BuCp)2ZrCl2 catalyst system produced polyethylene with extremely high molecular weight (MW), much higher than the MW of polyethylene from unsupported (n-BuCp)2ZrCl2 catalyst. We suggest that MLG can serve not only as a support for adsorption but also as an additional ligand to (n-BuCp)2ZrCl2 during ethylene polymerization. The surface of graphene can be a strong and bulky ligand that is attached to (n-BuCp)2ZrCl2. The β-hydrogen elimination mechanism can be disturbed by the bulky surface of graphene. The initial degradation temperature (Tonset) for the MLG/polyolefin nanocomposites increased by about 20 oC compared with neat polyolefin, and maximum mass loss temperature (Tmax) increased by about 7 oC. It means the presence of graphene definitely improve thermal stability of polyolefin when it is dispersed in the polymer matrix. Nano-dispersed MLG can act as barriers to hinder the heat transfer within the MLG/polyolefin nanocomposites, which would shift to higher degradation temperature. |
| 저자 |
이정숙 |
| 소속 |
공주대 |
| 키워드 |
Graphene; Metallocene; Olefin Polymerization; Polymer Nanocomposites
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| E-Mail |
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| 원문파일 |
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