title: Catalytic activity during copolymerization of ethylene and 1-hexene via mixed TiO2/SiO2-supported MAO with rac-Et[Ind]2ZrCl2 metallocene catalyst.
abstract: Activities during ethylene/1-hexene copolymerization were found to increase using the mixed titania/silica-supported MAO with rac-Et[Ind]2ZrCl2 metallocene catalyst. Energy Dispersive X-ray spectorcopy (EDX) indicated that the titania was apparently located on the outer surface of silica and acted as a spacer to anchor MAO to the silica surface. IR spectra revealed the Si-O-Ti stretching at 980 cm(-1) with low content of titania. The presence of anchored titania resulted in less steric hindrance and less interaction due to supporting effect.
authors.affiliation: Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. bunjerd.j@chula.ac.th
authors.forename: Bunjerd
authors.initials: B
authors.lastname: Jongsomjit
authors.forename: Sutti
authors.initials: S
authors.lastname: Ngamposri
authors.forename: Piyasan
authors.initials: P
authors.lastname: Praserthdam
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D009942:Organometallic Compounds; D011108:Polymers / Q000138:chemical synthesis*; D012822:Silicon Dioxide; D017550:Spectroscopy, Fourier Transform Infrared; D013057:Spectrum Analysis; D014025:Titanium; D014965:X-Rays
chemical_list: D000475:Alkenes; D005030:Ethylenes; D009942:Organometallic Compounds; D011108:Polymers; C013108:metallocene; C009495:titanium dioxide; D012822:Silicon Dioxide; C036216:ethylene; C117224:1-hexene; D014025:Titanium