0000000001305048

AUTHOR

Randi Zhang

showing 5 related works from this author

Achieving branched polyethylene waxes by aryliminocycloocta[b]pyridylnickel precatalysts: Synthesis, characterization, and ethylene polymerization

2017

Cycloocta[b]pyridin-10-one was prepared to form the corresponding imino derivatives, which then reacted with (DME)NiBr2 to form 10-aryliminocycloocta[b]pyridylnickel bromides (Ni1–Ni5). The new compounds were characterized by means of FT-IR spectroscopy as well as elemental analysis and the organic ligands were also analyzed by the NMR measurements. Furthermore, the molecular structure of a representative complex Ni3 was determined by the single crystal X-ray diffraction, indicating the distorted tetrahedral geometry around the nickel atom. Upon the activation with either methylaluminoxane (MAO) or diethylaluminium chloride (Et2AlCl), the title nickel complexes exhibited high activity in et…

Diethylaluminium chloridePolymers and Plastics010405 organic chemistryChemistryOrganic ChemistryDispersityMethylaluminoxaneCationic polymerizationnickel complexPolyethylene010402 general chemistryBranching (polymer chemistry)01 natural sciences0104 chemical scienceschemistry.chemical_compoundPolymerization10-aryliminocycloocta[b]pyridinePolymer chemistryMaterials ChemistryCoordination polymerizationcationic polymerizationpolyethyl-eneJournal of Polymer Science Part A-Polymer Chemistry
researchProduct

Finely tuned nickel complexes as highly active catalysts affording branched polyethylene of high molecular weight: 1-(2,6-Dibenzhydryl-4- methoxyphen…

2018

Abstract A series of unsymmetrical 1,2-bis(imino)acenaphthenenickel(II) halides containing N-2,6-dibenzhydryl-4-methoxyphenyl – a single bulky group with adjusted electron donating properties – has been synthesized and characterized. These compounds adopt distorted tetrahedral geometry and their 1H NMR spectra show the paramagnetically shifted peaks. On activation with a low amount of Et2AlCl or ethylaluminum sesquichloride (EASC), these nickel complexes display high activity in ethylene polymerization, yielding the polyethylene of high molecular weight. They are also stable at elevated temperature; superb activity of 2.51 × 106 g of PE (mol of Ni)−1 h−1 can be attained at 90 °C. The result…

Polymers and Plastics010405 organic chemistryOrganic Chemistrychemistry.chemical_elementHalideTetrahedral molecular geometrythermoplastic elastomerPolyethylenebranched polyethylene010402 general chemistryethylene polymerization01 natural sciences0104 chemical sciencesCatalysisNickelchemistry.chemical_compoundchemistryUltimate tensile strengthPolymer chemistryMaterials ChemistryProton NMRElongationPolymer
researchProduct

CCDC 1831144: Experimental Crystal Structure Determination

2018

Related Article: Ruikai Wu, Yifan Wang, Randi Zhang, Cun-Yue Guo, Zygmunt Flisak, Yang Sun, Wen-Hua Sun|2018|Polymer|153|574|doi:10.1016/j.polymer.2018.08.056

Space GroupCrystallographyCrystal SystemCrystal Structure(N1-[26-bis(diphenylmethyl)-4-methoxyphenyl]-N2-(246-trimethylphenyl)acenaphthylene-12-diimine)-dichloro-nickel dichloromethane solvateCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1542647: Experimental Crystal Structure Determination

2017

Related Article: Randi Zhang, Zheng Wang, Zygmunt Flisak, Xiang Hao, Qingbin Liu, Wen-Hua Sun|2017|J.Polym.Sci.,Part A:Polym.Chem.|55|2601|doi:10.1002/pola.28653

Space GroupCrystallographyCrystal SystemCrystal Structuredibromo-{N-[26-bis(propan-2-yl)phenyl]-6789-tetrahydrocycloocta[b]pyridin-10(5H)-imine}-nickel(ii)Cell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1831143: Experimental Crystal Structure Determination

2018

Related Article: Ruikai Wu, Yifan Wang, Randi Zhang, Cun-Yue Guo, Zygmunt Flisak, Yang Sun, Wen-Hua Sun|2018|Polymer|153|574|doi:10.1016/j.polymer.2018.08.056

Space GroupCrystallographyCrystal SystemCrystal Structure(N1-[26-bis(diphenylmethyl)-4-methoxyphenyl]-N2-[26-diisopropylphenyl]acenaphthylene-12-diimine)-dibromo-nickel(ii) dichloromethane solvateCell ParametersExperimental 3D Coordinates
researchProduct