الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
Nowadays, the Egyptian petrochemicals industry is looking to fulfill the local market
needs in addition it is looking for invasion of the global markets. The whole plants crew is
fighting against any plant shut down to keep the wheel on.
The fluidized bed reactor is one of the main technologies used to produce polyolefin’s.
Even with the great advantage of this technology interruption in the reactor temperature
gradients may occur due to many processing causes. As soon as the temperature at this area is
higher than the polymer melting point, the melted polymer powder at this area becomes very
sticky. Increasing powder sizes due to the collisions with other particles forming a large
chunk will clause of the reactor orifice. The plant shut down decision is taken due to the risky
’reactor situations .The reactor will be stopped for days to be cleaned. This event is called
agglomerates formation
This work addresses the influence of the prepolymer and polymer particle properties
.” such as the melt index, density, particle size distributions, powder bulk density and catalyst
residual by the X ray florescence and the agglomerates formation with different forms.
Also, the spectral analysis (UV) and (FTIR) show no difference in the internal
structure between the prepolymer, polymer and the agglomerates.
The electrostatic charge results were from 140 and 160 coulomb for prepolymer,
from 35 to 80 for the polymer and from 40 to 48 for the agglomerates.
Thermal analysis (DSC) was also studied to differentiate between the polymers,
prepolymer and agglomerates melting points. The prepolymer melting point was from
129QC to 136 QC, the polymer was from 148 to 152 QC and finally for the agglomerates it
was from 127QC to 133 QC.
A strong relation between the melting point, particle SIze and the shape of
agglomerates was found where the difference in melting yoint between the different shapes
of agglomerates was found to be 9QC. On the other hand, the powder particle size
distribution gives an idea in tracing the different shapes of agglomerates.