摘要
A novel polymer-supported metallocene catalyst has been prepared. The polymer-support-ed metallocene displayed considerably high activity in ethylene polymerization, the highest being 3.62× 107 g/(mol · h), the molecular weight of the polyethylene produced was Mn = 1.29 × 105 , about 3～4 times those prepared by corresponding homogeneous zirconocenes. The polymer-supported metallocene poly(styrene-acrylamide)supported zirconocene]keeps thecharacteristics of homogeneous metallocene catalysts, and offers some features, such as adaptable togas phase and slurry processes; easy to prepare in low cost; relatively high activity and lowerMAO/Zr ratio ; lower inorganic residues in the polyolefins as compared to those using SiO2, Al2O3 orMgCl2; unitary active structure, no complex surface as with SiO2; good control of morphology of theresulting polymer.
A novel polymer supported metallocene catalyst has been prepared. The polymer supported metallocene displayed considerably high activity in ethylene polymerization,the highest being 3 62×10 7 g/(mol·h), the molecular weight of the polyethylene produced was M n=1 29×10 5, about 3~4 times those prepared by corresponding homogeneous zirconocenes. The polymer supported metallocene [poly(styrene acrylamide)supported zirconocene]keeps the characteristics of homogeneous metallocene catalysts, and offers some features, such as adaptable to gas phase and slurry processes; easy to prepare in low cost; relatively high activity and lower MAO/Zr ratio; lower inorganic residues in the polyolefins as compared to those using SiO 2, Al 2O 3 or MgCl 2; unitary active structure, no complex surface as with SiO 2; good control of morphology of the resulting polymer.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第4期309-311,共3页
Chinese Journal of Applied Chemistry
基金
国家科技部"九五"攻关项目!( 96-A 12 -0 2 -0 1)
中国科学院重点课题!( L 12 0 0 0 1W)
