THE EFFECT OF INJECTION MOULDING PROCESSING CONDITIONS AND α- OLEFIN CO-MONOMER TYPE ON THE PERFORMANCE OF METALLOCENE CATALYSED POLYETHYLENES

摘要

A number of metallocene catalysed linear low density polyethylenes and a conventional LDPE, of different material properties, were injection moulded over different mould cooling conditions. An assessment of the effect of the cooling rate, density and the co-monomer type on the mechanical performance and crystallinity was then conducted in order to establish any underlying trends. The results obtained from this report show a direct correlation between the density and co-monomer type of the materials with the mechanical properties, and a less significant relationship with the mould temperatures.