Aging resistance and stabilization of high density polyethylene formed on vanadium-containing catalyst

Vanadium-containing catalysts give faster polymerisation rates than the usual titanium-containing catalysts and the resulting h.d. PE has better properties. This article deals with tests of the resistance of such h.d. PE to heat and light ageing, and shows that in these respects also the vanadium-containing catalysts give better h.d. PE