These complexes are insoluble in methylene chloride and can be separated from {HEAD ~ unreacted polyetherimide} by {TAIL ~ filtration} 
These complexes are insoluble in methylene chloride and can be separated from { HEAD ~ unreacted polyetherimide } by { TAIL ~ filtration }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL