Aroylhydrazones,formed by condensation of benzoylhydrazine with benzoylaldehyde,2-methoxybenzoylaldehyde and 2,4-dimethoxybenzoylaldehyde,reacted with TiCl 4 to form their corresponding complexes.The titanium complexes were characterized by elementary analysis,IR,and 1H-NMR.Their catalytic properties for ethylene polymerization performed up to 104gPE/(molTi·h).The resultant PE was studied by DSC,GPC,WAXD,FT-IR analyses.The results reveal that the product obtained is a typical linear polyethylene.
A series of bridged ligand 4,4′-methylene-bis [2,6-dialkyl-N-(2-phenylmethylene)-anil] was efficiently synthesized by the condensation reaction of 4,4′-methylene-bis(2,6-disubstituted aniline) and salicyl aldehyde.They easily coordinated with Ni (Ⅱ) to form the title complexes,which were characterized by IR spectroscopy and elemental analysis.The complexes show good activities for vinyl polymerization of norbornene with methylalumoxane (MAO) as co-catalyst.The variations of complexes and catalytic parameters were investigated along with viscosimetric measurement of resultant polynorbornenes.
