The effects of new aminosilane compounds as external donors on propylene polymerization
文献类型：期刊论文
| 作者 | Chang, Hefei1; Li, Huayi2; Zheng, Tao1; Zhou, Qian1; Zhang, Liaoyun1; Hu, Youliang2 |
| 刊名 | JOURNAL OF POLYMER RESEARCH
 |
| 出版日期 | 2014-08-29 |
| 卷号 | 21期号:9 |
| 关键词 | Polypropylene Aminosilane External Donor Molecular Weight Distribution Successive Self-nucleation And Annealing Isotactic Sequence Length |
| ISSN号 | 1022-9760 |
| DOI | 10.1007/s10965-014-0554-9 |
| 英文摘要 | The new aminosilane compounds including Dimorpholindimethoxysilane (Donor-Pm), Di (1-methylpiperazine) dimethoxysilane (Donor-Pz) and Di (isopropylpiperazine) dimethoxysilane (Donor-Pi) were firstly synthesized and then employed as external donors for propylene polymerization with MgCl2-supported Ziegler-Natta catalyst, compared with dipiperidine dimethoxysilane (Donor-Py). The effects of the aminosilane external donors on the catalytic activity, hydrogen response, and molecular weight distribution, crystalline ability, thermal property, isotactic sequence length, isotactic sequence distribution of polypropylene were studied by differential scanning calorimetry (DSC), gel permeation chromatography (GPC), and self-nucleation and annealing (SSA), respectively. It was found that these new aminosilane compounds were conducive to improving the isotacticity of polypropylene and the catalytic activity. The GPC results showed that the molecular weight distribution of polypropylene prepared respectively by Donor-Pz or Donor-Pi with two N atoms on each amino substituent group was broader more than 8.0, especially for Donor-Pi with the large alkyl-substituted group on each nitrogen atom, the molecular weight distribution of polypropylene was about 11.2, which was much broader than that of industrial polypropylene about 4 similar to 5. The DSC results indicated that the degrees of crystallinity of polypropylene prepared by the aminosilane external donors were higher, and the crystallization ability of polypropylene prepared by Donor-Pi was lower but closed to that of polypropylene prepared by Donor-Py. The SSA results indicated Donor-Py and Donor-Pi were conducive to improving the relative contents of the highest isotactic component of polypropylene, and the lamellae thicknesses results showed the sequence length of polypropylene prepared by Donor-Py and Donor-Pi were longer, and the isotactic sequence distribution of polypropylene prepared by Donor-Py and Donor-Pi were broader. The study results showed that the new aminosilane donor Donor-Pi was conducive to improving the stereo-regularity of polypropylene, especially revealing that it was a simple and an effective method to synthesize broad molecular weight distribution of polypropylene by using appropriate aminosilane external donor for propylene polymerization. |
| 语种 | 英语 |
| WOS记录号 | WOS:000341484600001 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50837]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Liaoyun |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Hefei,Li, Huayi,Zheng, Tao,et al. The effects of new aminosilane compounds as external donors on propylene polymerization[J]. JOURNAL OF POLYMER RESEARCH,2014,21(9). |
| APA | Chang, Hefei,Li, Huayi,Zheng, Tao,Zhou, Qian,Zhang, Liaoyun,&Hu, Youliang.(2014).The effects of new aminosilane compounds as external donors on propylene polymerization.JOURNAL OF POLYMER RESEARCH,21(9). |
| MLA | Chang, Hefei,et al."The effects of new aminosilane compounds as external donors on propylene polymerization".JOURNAL OF POLYMER RESEARCH 21.9(2014). |
入库方式： OAI收割
来源：化学研究所
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