{TAIL ~ A specific order} of addition involves mixture of the transition metal component and the co catalyst component for a contact time of 5 120 seconds followed by {HEAD ~ contact} with an electron donor component for no more than 30 seconds 
{ TAIL ~ A specific order } of addition involves mixture of the transition metal component and the co catalyst component for a contact time of 5 120 seconds followed by { HEAD ~ contact } with an electron donor component for no more than 30 seconds
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH