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High densitypolyethylene (PE )wasdevelopedinthe 195 0sbyHoganetal[1] usingaCr2 O3 /SiO2catalystandbytheUnionCarbideCorporation[2 ,3 ]usingaCp2 Crcatalyst .Chromiumcatalystshaveplayedakeyroleintheearlydevelopmentofhetero geneouscatalystsforthealkene polyme
High density polyethylene (PE) was developedinthe 195sbyHoganetal [1] usingaCr2O3 / SiO2catalyst bytheUnionCarbideCorporation [2, 3] usingaCp2Crcatalyst .Chromiumcatalystshaveplayedakeyroleintheearlydevelopmentofheterogeneouscatalystsforthealkene polyme