Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. II. Influence on crystallization and melting behavior
文献类型：期刊论文
| 作者 | Zhang FJ ; Liu JP ; Xie FC ; Fu Q ; 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:822-830 |
| 关键词 | DIFFERENTIAL SCANNING CALORIMETRY ETHER ETHER KETONE) LOW-DENSITY POLYETHYLENE TIME-RESOLVED SAXS ISOTHERMAL CRYSTALLIZATION TOPOLOGICAL CONSTRAINTS HOMOGENEOUS COPOLYMERS MORPHOLOGICAL-CHANGES BUTENE COPOLYMERS POLYMERS |
| ISSN号 | 0887-6266 |
| 通讯作者 | he tb |
| 中文摘要 | in this work, crystallization and melting behavior of metallocene ethylene/alpha-olefin copolymers were investigated by differential scanning calorimetry (dsc) and atomic force microscopy (afm). the results indicated that the crystallization and melting temperatures for all the samples were directly related to the long ethylene sequences instead of the average sequence length (asl), whereas the crystallization enthalpy and crystallinity were directly related to asl, that is, both parameters decreased with a decreasing asl. multiple melting peaks were analyzed by thermal analysis. three phenomena contributed to the multiple melting behaviors after isothermal crystallization, that is, the melting of crystals formed during quenching, the melting-recrystallization process, and the coexistence of different crystal morphologies. two types of crystal morphologies could coexist in samples having a high comonomer content after isothermal crystallization. they were the chain-folded lamellae formed by long ethylene sequences and the bundlelike crystals formed by short ethylene sequences. the coexistence phenomenon was further proved by the afm morphological observation. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000175181500006 |
| 公开日期 | 2010-11-03 |
| 源URL | [http://202.98.16.49/handle/322003/18659]  |
| 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,Xie FC,et al. Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. II. Influence on crystallization and melting behavior[J]. journal of polymer science part b-polymer physics,2002,40(9):822-830. |
| APA | Zhang FJ,Liu JP,Xie FC,Fu Q,&He TB.(2002).Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. II. Influence on crystallization and melting behavior.journal of polymer science part b-polymer physics,40(9),822-830. |
| MLA | Zhang FJ,et al."Polydispersity of ethylene sequence length in metallocene ethylene/alpha-olefin copolymers. II. Influence on crystallization and melting behavior".journal of polymer science part b-polymer physics 40.9(2002):822-830. |
入库方式： OAI收割
来源：长春应用化学研究所
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