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Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach
Ansari, Ziaul Haque1,2; Zeng, Yan3; Demopoulos, George P.3; Li, Zhibao1
2018-07-15
Source PublicationJOURNAL OF CRYSTAL GROWTH
ISSN0022-0248
Volume494Pages:44-52
Abstract

MgCl2-ethanol adducts play a key role in the synthesis of supported Ziegler-Natta catalysts. The morphology of the MgCl2-ethanol adducts, which is controlled by their crystallization process, can determine the structure and thus the property of the polyolefin products. Here we study the nucleation kinetics of MgCl2-ethanol adducts by measuring the metastable zone width (MSZW) and induction time at different temperatures. Supersaturation ratios used in induction time measurements were predicted by the Mixed Solvent Electrolyte (MSE) model embedded in OLI System. Nyvlt's approach was applied to determine MSZW. By the induction time measurement, the effect of temperature, and supersaturation were studied. It was found that induction time decreases as either temperature or supersaturation increases. The measured MSZW and induction time are used to estimate the nucleation kinetics of the system, and thereby distinguishing between the homogeneous and heterogeneous mechanisms. The interfacial tension and other related nucleation parameters were calculated from the induction time data. XRD and TGA indicate that the MgCl2-ethanol adduct has the stoichiometry of MgCl2 center dot 6C(2)H(5)OH.

KeywordMgcl2-ethanol Adduct Z-n Catalyst Metastable Zone Width Induction Time
DOI10.1016/j.jcrysgro.2018.05.007
Language英语
WOS KeywordSolvent Electrolyte Systems ; Partial Molal Properties ; Metastable Zone ; High-pressures ; Recrystallization Method ; Transport-properties ; Magnesium-chloride ; Polymerization ; Ethanol ; Mgcl2
Funding ProjectNational Natural Science Foundation of China[21476235] ; National Natural Science Foundation of China[21776279]
WOS Research AreaCrystallography ; Materials Science ; Physics
WOS SubjectCrystallography ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000432749700006
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24747
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Zhibao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.McGill Univ, Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada
Recommended Citation
GB/T 7714
Ansari, Ziaul Haque,Zeng, Yan,Demopoulos, George P.,et al. Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach[J]. JOURNAL OF CRYSTAL GROWTH,2018,494:44-52.
APA Ansari, Ziaul Haque,Zeng, Yan,Demopoulos, George P.,&Li, Zhibao.(2018).Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach.JOURNAL OF CRYSTAL GROWTH,494,44-52.
MLA Ansari, Ziaul Haque,et al."Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach".JOURNAL OF CRYSTAL GROWTH 494(2018):44-52.
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