شماره ركورد كنفرانس :
5048
عنوان مقاله :
A Method for Synthesis a High Density Polyethylene by Coordination Polymerization
Author/Authors :
Leila ،Moballegh Department of Polymerization Engineering - Iran Polymer and Petrochemical Institute, Tehran, Iran , Shokoufeh ،Hakim Department of Polymerization Engineering - Iran Polymer and Petrochemical Institute, Tehran, Iran
كليدواژه :
polyethylene , polymerization , Ziegler-Natta , mechanical properties , molecular weight
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
A method is described to achieve appropriate mechanical properties and flowability of high density
polyethylene through tandem ethylene polymerization with a coordination multisite catalyst. In the first
step of polymerization, low molecular weight homopolymer of ethylene in the presence of hydrogen and
in the next step, high molecular weight copolymer of ethylene with 1-butene in the absence of hydrogen
were produced. Increasing hydrogen amount leads to increase of polydispersity index. Depending on the
polymerization times, increasing hydrogen concentration can either increase or decrease average
molecular weights. The effects of the mentioned parameters on the processability and mechanical
properties of some samples were discussed.
