Microstructure of two polypropylene homopolymers with improved impact properties
文献类型：期刊论文
| 作者 | Fan, Yandi; Zhang, Chunyu; Xue, Yanhu; Zhang, Xuequan; Ji, Xiangling; Bo, Shuqin |
| 刊名 | POLYMER
 |
| 出版日期 | 2011-01-21 |
| 卷号 | 52期号:2页码:557-563 |
| 关键词 | Polypropylene Fractionation Microstructure |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2010.12.009 |
| 英文摘要 | Two polypropylene homopolymers, samples A and B. synthesized with heterogeneous Ziegler-Natta catalysts, are studied in this work. Both samples show improved impact properties at low temperature than isotactic PP. Particularly, sample B exhibits better toughness, higher molecular weight and slight lower flexural properties than sample A. Then, these two samples were fractionated into six fractions via temperature rising dissolution fractionation, respectively. Both samples are mainly composed of fractions 4, 5 and 6, which were collected above 100 degrees C and have high isotacticity. On the one hand, the fractions of sample B have higher molecular weight than the corresponding fractions of sample A collected at the same temperatures. On the other hand, (13)C NMR and DSC analyses of the fractions indicate clearly that fractions of sample B have lower isotacticity and crystallinity than the corresponding fractions of sample A. The above difference in microstructure between samples A and B should be the key factors resulting in their difference in mechanical properties finally. Both polypropylene homopolymers possibly become new type of impact PP. (C) 2010 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000286480100041 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/71445]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ji, Xiangling |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Yandi,Zhang, Chunyu,Xue, Yanhu,et al. Microstructure of two polypropylene homopolymers with improved impact properties[J]. POLYMER,2011,52(2):557-563. |
| APA | Fan, Yandi,Zhang, Chunyu,Xue, Yanhu,Zhang, Xuequan,Ji, Xiangling,&Bo, Shuqin.(2011).Microstructure of two polypropylene homopolymers with improved impact properties.POLYMER,52(2),557-563. |
| MLA | Fan, Yandi,et al."Microstructure of two polypropylene homopolymers with improved impact properties".POLYMER 52.2(2011):557-563. |
入库方式： OAI收割
来源：化学研究所
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