Copolymerization of Ethylene and Methyl Methacrylate by Bis-(salicylaldiminato)Nickel(Ⅱ)Complexes

Three bis-(salicylaldiminato)nickel(Ⅱ)complexes with different steric hindrances on the adjacent position of aniline group,[O-(3,5-I2)C_6H_3-o-C(H)N-2,6-C_6H_3(Me)2]2 Ni(C1),[O-(3,5-I2)C_6H_3-o-C(H)-N-2,6-C_6H_3(Et)2]2 Ni(C2)and [O-(3,5-I2)C_6H_3-o-C(H)-N-2,6-C_6H_3(i-Pr)2]2 Ni(C3),were successfull...

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Bibliographic Details
Published inHua dong li gong da xue xue bao. Zi ran ke xue ban Vol. 35; no. 3
Main Authors Ju, Wei, Yu, Dong-ping, Xu, Chen-fei, Han, Yi-qin, Gao, Yi-jian, Li, Dong-ya, Zhang, Dan-feng
Format Journal Article
LanguageChinese
Published Shanghai East China University of Science and Technology 01.01.2018
Subjects
Aluminum
Aniline
Catalysis
Catalysts
Catalytic activity
Chemical synthesis
Copolymerization
Dosage
Ethylene
Infrared spectroscopy
Ligands
Mass spectrometry
Nickel
NMR
Nuclear magnetic resonance
Polymerization
Polymers
Polymethyl methacrylate
Reaction time
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Summary:Three bis-(salicylaldiminato)nickel(Ⅱ)complexes with different steric hindrances on the adjacent position of aniline group,[O-(3,5-I2)C_6H_3-o-C(H)N-2,6-C_6H_3(Me)2]2 Ni(C1),[O-(3,5-I2)C_6H_3-o-C(H)-N-2,6-C_6H_3(Et)2]2 Ni(C2)and [O-(3,5-I2)C_6H_3-o-C(H)-N-2,6-C_6H_3(i-Pr)2]2 Ni(C3),were successfully synthesized based on the reaction of Ni(CH3 COO)2·4 H2 O with ligands L1-L3,HO-(3,5-I2)C_6H_2-o-C(H) N-2,6-C_6H_3(Me)2(L1),HO-(3,5-I2)C_6H_2-o-C(H) N-2,6-C_6H_3(Et)2(L2)and HO-(3,5-I2)C_6H_2-o-C(H) N-2,6-C_6H_3(i-Pr)2(L3).The ligands were characterized by 1 H-NMR and FT-IR,and the formed complexes were characterized by 1 H-NMR,FT-IR,element analysis(EA)and mass spectrometry(MS).The complexes were applied for copolymerization of ethylene and methyl methacrylate(MMA)in the presence of methylaluminoxane(MAO). The effects of different polymerization factors,such as Al、Ni molar ratio(nAl/nNi),catalyst dosage,polymerization reaction temperature and ethylene pressure,the concentration of MMA and polymerization reaction
ISSN:1006-3080