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Characterization of the effects of the C/N mixed external donors on the stereo-defects distribution of polypropylene by successive self-nucleating and annealing and C-13-NMR techniques

文献类型：期刊论文

作者Chang, Hefei1; Li, Huayi2; Zheng, Tao1; Zhang, Liaoyun1; Yuan, Wei3; Li, Lei3; Huang, He3; Hu, Youliang2
刊名JOURNAL OF POLYMER RESEARCH
出版日期2013-08-01
卷号20期号:8
关键词Polypropylene Mixed External Donors Lamellar Thickness Isotactic Sequence Length Successive Self-nucleation And Annealing
ISSN号1022-9760
DOI10.1007/s10965-013-0207-4
英文摘要As the external donor in Ziegler-Natta catalysts have an important influence on the stereo-defects distribution of polypropylene, the effects of the mixed external donors (the mixture of Donor-C (cyclohexylmethyldimethoxysilane) and Donor-N (n-propyltriethoxysilane)) on the isotactic sequence length and its distribution of polypropylene prepared by Ziegler-Natta catalyst through propylene bulk polymerization were studied through the Successive self-nucleating and annealing (SSA) and C-13-NMR techniques. The SSA results showed that the relative contents of the highest isotactic component and the lamellar thickness in the polypropylene chain gradually increased with the increase of the relative component of Donor-C in the C/N mixed external donors, indicating the isotactic sequence length of polypropylene got longer, and the lamellar thickness distribution of polypropylene became broader, revealing the isotactic sequence length distribution of polypropylene got broader. In addition, the C-13-NMR results showed that the average meso isotactic sequence length (MSL) of polypropylene gradually increased with the increase of the content of Donor-C in the C/N mixed external donors, which was in good coincident with the results calculated from SSA, showing a good correspondence between the SSA and C-13-NMR techniques.
语种英语
WOS记录号WOS:000322594700010
出版者SPRINGER
源URL[http://ir.iccas.ac.cn/handle/121111/42209]  
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
3.Coal Chem Ind Co Ltd, Shenhua Ningxia Coal Ind Grp, Yinchuan 750002, Peoples R China
推荐引用方式
GB/T 7714		 Chang, Hefei,Li, Huayi,Zheng, Tao,et al. Characterization of the effects of the C/N mixed external donors on the stereo-defects distribution of polypropylene by successive self-nucleating and annealing and C-13-NMR techniques[J]. JOURNAL OF POLYMER RESEARCH,2013,20(8).
APA Chang, Hefei.,Li, Huayi.,Zheng, Tao.,Zhang, Liaoyun.,Yuan, Wei.,...&Hu, Youliang.(2013).Characterization of the effects of the C/N mixed external donors on the stereo-defects distribution of polypropylene by successive self-nucleating and annealing and C-13-NMR techniques.JOURNAL OF POLYMER RESEARCH,20(8).
MLA Chang, Hefei,et al."Characterization of the effects of the C/N mixed external donors on the stereo-defects distribution of polypropylene by successive self-nucleating and annealing and C-13-NMR techniques".JOURNAL OF POLYMER RESEARCH 20.8(2013).

入库方式： OAI收割

来源：化学研究所

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