شماره ركورد كنفرانس :
5048
عنوان مقاله :
Preparation of Bi-supported Ziegler-Natta catalysts of MgCl2/SiO2 for Ethylene polymerization
Author/Authors :
A ،Rouhisefat Polymer Engineering Department - Amirkabir University of Technology - Tehran, Iran , M ،Vatankhah Polymer Engineering Department - Amirkabir University of Technology - Tehran, Iran , S ،Pourmahdian Polymer Engineering Department - Amirkabir University of Technology - Tehran, Iran
كليدواژه :
Polyethylene , Ziegler-Natta catalyst , supported catalyst , slurry polymerizationmolecular weight distribution
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
A novel MgCl2/SiO2-supported Ziegler-Natta catalyst was synthesized. Slurry polymerization of ethylene
was carried out using the catalyst in dry hexane, while; TEA was used as cocatalyst. The cocatalysts
effects, such as cocatalyst/catalyst molar ratio, H2 concentration, polymerization temperature and
monomer pressure on activity of the catalyst were investigated. Ti concentration in solid catalyst was
0.86% wt. Structural study was carried out using FTIR, SEM, XRF,GPC and BET techniques. It was
found that the polydispersity index of polyethylene could be adjusted over a wide range of 2-15 through
regulating the [Mg]/[Si] ratio and polymerization temperature, and especially when the [Mg]/[Si] ratio
was unity, the polydispersity index could be reached over 14. The results showed the addition of
hydrogen caused to decrease the activity of catalyst, while; increasing monomer pressure caused to have
an increase in activity.
