The methylene chloride forms {TAIL ~ a complex} with the unreacted polyphenylene ether and with {HEAD ~ the polyphenylene ether portion} of the copolymer 
The methylene chloride forms { TAIL ~ a complex } with the unreacted polyphenylene ether and with { HEAD ~ the polyphenylene ether portion } of the copolymer
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH