| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 |
29권 2호, p.94 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
One-Dimensional Exchange NMR Studies on Semicrystalline Polyethylenes |
| 초록 |
It is well known that incorporation of a small amount of short-chain branches has a dramatic effect on the mechanical properties of polyethylene. Although extensive research work has been carried out to study the structural changes caused by the short branches in the lamellar crystalline region, most studies have neglected the influence of the noncrystalline region. In this study, we used a solid-state NMR technique to monitor the chain diffusion between the amorphous and crystalline regions. Two samples, linear polyethylene and ethylene-1-hexene copolymer, were investigated by one-dimensional exchange 13C NMR experiments under high-resolution magic-angle-spinning as a function of temperature. The results give indications of the differences in the structure and dynamic behavior of the interphases between crystalline and amorphous regions depending on the presence of short-chain branching. |
| 저자 |
신은지1, 윤도영1, Robert Graf2, Hans Wolfgang Spiess2
|
| 소속 |
1서울대, 2Max Planck Institute for Polymer Research |
| 키워드 |
exchange nmr; chain diffusion; semicrystalline polyethylene
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| E-Mail |
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