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