Structural changes and chain radius of gyration in cold-drawn polyethylene after annealing: Small- and wide-angle X-ray scattering and small-angle neutron scattering studies
文献类型：期刊论文
| 作者 | Men, YF; Rieger, J; Lindner, P; Enderle, HF; Lilge, D; Kristen, MO; Mihan, S; Jiang, SC |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2005-09-08 |
| 卷号 | 109期号:35页码:16650-16657 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp052723g |
| 英文摘要 | Samples made from linear polyethylene were drawn at room temperature and subsequently annealed at high temperatures below the melting point. The structural changes of the crystalline lamellae and lamellar superstructures as well as the single chain radius of gyration were studied by means of combined small- and wide-angle X-ray scattering and small-angle neutron scattering (SANS). After drawing, the polymeric chain segments in the crystalline phase are preferentially oriented along the drawing direction with a high degree of orientation whereas the lamellae in the samples are found to be slightly sheared exhibiting oblique surfaces as evidenced by X-ray scattering. SANS indicates that the chains are highly elongated along the drawing direction. Annealing the deformed samples at temperatures where the mechanical alpha-process of polyethylene is active leads to a thickening of both crystalline lamellae and amorphous layers. The chains in the crystalline phase retain their high degree of orientation after annealing while the lamellae are sheared to a larger extent. In addition, there is also lateral growth of the crystalline lamellae during high-temperature annealing. Despite the structural changes of the crystalline and amorphous regions, there is no evidence for global chain relaxation. The global anisotropic shape of the chains is preserved even after prolonged annealing at high temperatures. The results indicate that the mobility of polyethylene chains-as seen, e.g., by C-13 NMR-is a local phenomenon. The results also yield new insight into mechanical properties of drawn PE, especially regarding stress relaxation and creep mechanisms. |
| 语种 | 英语 |
| WOS记录号 | WOS:000231687400014 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/57005]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Men, YF |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.BASF AG, Polymer Phys, D-67056 Ludwigshafen, Germany 3.Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France 4.Basell Polyolefine GmbH, R&D, D-65926 Frankfurt, Germany 5.Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany |
| 推荐引用方式 GB/T 7714 | Men, YF,Rieger, J,Lindner, P,et al. Structural changes and chain radius of gyration in cold-drawn polyethylene after annealing: Small- and wide-angle X-ray scattering and small-angle neutron scattering studies[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2005,109(35):16650-16657. |
| APA | Men, YF.,Rieger, J.,Lindner, P.,Enderle, HF.,Lilge, D.,...&Jiang, SC.(2005).Structural changes and chain radius of gyration in cold-drawn polyethylene after annealing: Small- and wide-angle X-ray scattering and small-angle neutron scattering studies.JOURNAL OF PHYSICAL CHEMISTRY B,109(35),16650-16657. |
| MLA | Men, YF,et al."Structural changes and chain radius of gyration in cold-drawn polyethylene after annealing: Small- and wide-angle X-ray scattering and small-angle neutron scattering studies".JOURNAL OF PHYSICAL CHEMISTRY B 109.35(2005):16650-16657. |
入库方式： OAI收割
来源：化学研究所
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