Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications
文献类型：期刊论文
| 作者 | Gou, Qingqiang; Li, Huihui; Yu, Zhenqiang; Chen, Erqiang; Zhang, Yudong; Yan, Shouke |
| 刊名 | COLLOID AND POLYMER SCIENCE
 |
| 出版日期 | 2007-07-01 |
| 卷号 | 285期号:10页码:1149-1155 |
| 关键词 | Alpha-ipp Gamma-ipp Crystallization Dsc Waxd Afm |
| ISSN号 | 0303-402X |
| DOI | 10.1007/s00396-007-1669-x |
| 英文摘要 | A random propylene-based copolymer containing 1.0 mol% 1-butene as co-unit, synthesized with Ziegler-Natta catalyst and then fractionated to make the sample having a uniform in molecular microstructure, was investigated by differential scanning calorimetry (DSC), wide-angle X-ray scattering (WAXD), and atomic force microscopy (AFM). In the DSC curves, one can see clearly the endothermic peaks corresponding to the melting of alpha-iPP crystals and a group of broad endothermic peaks associated to the melting of the gamma-iPP crystals. Wide-angle X-ray diffraction results indicate that both the alpha and gamma modifications can be formed in the copolymer in a wide temperature range. The gamma fraction increases first with increasing the crystallization temperature at the expense of its alpha component, which has been explained according to crystalline structures of iPP in its alpha and gamma forms, and then decreases with increasing crystallization temperature as the crystallization of iPP in its gamma phase has been suppressed at high temperatures. The gamma-iPP content in the copolymer reaches maximum at the temperature of 130 degrees C. The in situ X-ray diffraction characterization on the isothermal crystallization process at 130 degrees C indicates that, as long as the gamma-iPP can be detected, it takes always ca. 25% of the overall crystallinity. This leads to the conclusion that alpha- and gamma-iPP crystals grow simultaneously during the crystallization process. The fact that the alpha and gamma phases cannot be distinguished by morphological observation leads to the conclusion that they may intermix within one spherulite. |
| 语种 | 英语 |
| WOS记录号 | WOS:000247783900010 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60839]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan, Shouke |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.SINOPEC, Beijing Res Inst Chem Ind, Beijing 100013, Peoples R China 3.Peking Univ, Sch Chem, Dept Polymer Sci, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gou, Qingqiang,Li, Huihui,Yu, Zhenqiang,et al. Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications[J]. COLLOID AND POLYMER SCIENCE,2007,285(10):1149-1155. |
| APA | Gou, Qingqiang,Li, Huihui,Yu, Zhenqiang,Chen, Erqiang,Zhang, Yudong,&Yan, Shouke.(2007).Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications.COLLOID AND POLYMER SCIENCE,285(10),1149-1155. |
| MLA | Gou, Qingqiang,et al."Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications".COLLOID AND POLYMER SCIENCE 285.10(2007):1149-1155. |
入库方式： OAI收割
来源：化学研究所
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