A comparative study on supporting effect during copolymerization of ethylene/1-olefins with silica-supported zirconocene/MAO catalyst

作者：Jongsomjit B^*; Praserthdam P; Kaewkrajang P

来源：Materials Chemistry and Physics, 2004, 86(2-3): 243-246.

DOI：10.1016/j.matchemphys.2004.05.002

• catalysts
• microstructures
• polymers
• copolymerization
• ethylene copolymers

The silica-supported MAO was in situ- and ex situ immobilized with zirconocene catalyst to produce ethylene copolymers. The in situ catalytic system exhibited higher activities compared with the ex situ one. The ethylene/1-hexene (EH) copolymerization showed the highest activities for both catalytic systems. C-13 NMR revealed that the copolymers produced in all systems were random copolymers. In addition, the in situ system resulted in narrow molar mass distributions (MMD) for all copolymers indicating a uniform catalytic site present.

• 出版日期2004-8-15