Solution of {TAIL ~ a chalcogen} containing polymer in {HEAD ~ acids} and process of forming polymer articles therefrom 
Solution of { TAIL ~ a chalcogen } containing polymer in { HEAD ~ acids } and process of forming polymer articles therefrom
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH