Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. I. Characterized by thermal-fractionation technique
文献类型：期刊论文
| 作者 | Zhang FJ ; Liu JP ; Fu Q ; Huang HY ; Hu ZJ ; Yao S ; Cai XY ; He TB |
| 刊名 | journal of polymer science part b-polymer physics
 |
| 出版日期 | 2002 |
| 卷号 | 40期号:9页码:813-821 |
| 关键词 | LOW-DENSITY POLYETHYLENE SSA CALORIMETRIC TECHNIQUE HOMOGENEOUS COPOLYMERS BRANCHING DISTRIBUTION CRYSTALLIZATION MORPHOLOGY 1-OCTENE LLDPE HETEROGENEITY BEHAVIOR |
| ISSN号 | 0887-6266 |
| 通讯作者 | he tb |
| 中文摘要 | in this article, the polydispersity of the ethylene sequence length (esl) in ethylene/alpha-olefin copolymers was studied by atomic force microscopy (afm) and the thermal-fractionation technique. the crystal morphology observation by afm showed that morphology changed gradually with decreasing average esl from complete lamellae over shorter and more curved lamellae to a granular-like morphology, and the mixed morphology was observed after stepwise crystallization from phase-separated melt. this result indicated that the ethylene sequence with different lengths crystallized into a crystalline phase with a different size and stability at the copolymer systems. the thermal-fractionation technique was used to characterize the polydispersity of esl. three of the following statistical terms were introduced to describe the distribution of esl and the lamellar thickness: the arithmetic mean (l) over bar (n), the weight mean (l) over bar (w), and the broadness index i = (l) over bar (w)/(l) over bar (n). it was concluded that the polydispersity of esl could be quantitatively characterized by the thermal-fractionation technique. the effects of temperature range, temperature-dependent specific heat capacity c-p of copolymer, and the molecular weight on the results of thermal fractionation were discussed, |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000175181500005 |
| 公开日期 | 2010-11-03 |
| 源URL | [http://202.98.16.49/handle/322003/18657]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang FJ,Liu JP,Fu Q,et al. Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. I. Characterized by thermal-fractionation technique[J]. journal of polymer science part b-polymer physics,2002,40(9):813-821. |
| APA | Zhang FJ.,Liu JP.,Fu Q.,Huang HY.,Hu ZJ.,...&He TB.(2002).Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. I. Characterized by thermal-fractionation technique.journal of polymer science part b-polymer physics,40(9),813-821. |
| MLA | Zhang FJ,et al."Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. I. Characterized by thermal-fractionation technique".journal of polymer science part b-polymer physics 40.9(2002):813-821. |
入库方式： OAI收割
来源：长春应用化学研究所
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