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Thermal and crystallization behaviors of polyethylene blends synthesized by binary late transition metal catalysts combinations
Pan, L.; Zhang, Kun Y.; Li, Yan G.; Bo, Shu Q.; Li, Yue S.
2007-06-15
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume104Issue:6Pages:4188-4198
AbstractA series of reactor blends of linear and branched polyethylenes have been prepared, in the presence of modified methylaluminoxane, using a combination of 2,6-bis[1(2,6-dimethyphenylimino) pyridyl]-cobalt(II) dichloride (1), known as an active catalyst for producing linear polyethylene, and [1,4-bis(2,6-diidopropylphenyl)] acenaphthene diimine nickel(II) dibromide (2), which is active for the production of branched polyethylene. The polymerizations were performed at various levels of catalyst feed ratio at 10 bar. The linear correlation between catalyst activity and concentration of catalyst 2 suggested that the catalysts performed independently from each other. The weight-average molecular weights ((M) over bar (w)), crystalline structures, and phase structures of the blends were investigated, using a combination of gel permeation chromatography, differential scanning calorimetry, wide-angle X-ray diffraction, and small angle X-ray scattering techniques. It was found that the polymerization activities and MWs and crystallization rate of the polymers took decreasing tendency with the increase of the catalyst 2 ratios, while melting temperatures (T-m), crystalline temperatures (T,), and crystalline degrees took decreasing tendency. Long period was distinctly influenced by the amorphous component concentration. (c) 2007 Wiley Periodicals, Inc.
KeywordBlends Crystallization Polyethylene Synthesis
DOI10.1002/app.25960
Indexed BySCI
Language英语
WOS IDWOS:000246128400091
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62376
Collection中国科学院化学研究所
Corresponding AuthorLi, Yue S.
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Pan, L.,Zhang, Kun Y.,Li, Yan G.,et al. Thermal and crystallization behaviors of polyethylene blends synthesized by binary late transition metal catalysts combinations[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2007,104(6):4188-4198.
APA Pan, L.,Zhang, Kun Y.,Li, Yan G.,Bo, Shu Q.,&Li, Yue S..(2007).Thermal and crystallization behaviors of polyethylene blends synthesized by binary late transition metal catalysts combinations.JOURNAL OF APPLIED POLYMER SCIENCE,104(6),4188-4198.
MLA Pan, L.,et al."Thermal and crystallization behaviors of polyethylene blends synthesized by binary late transition metal catalysts combinations".JOURNAL OF APPLIED POLYMER SCIENCE 104.6(2007):4188-4198.
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