Controlled molecular weight phenylethynyl terminated imide oligomers (PETIs) have been prepared by the cyclodehydration of precursor phenylethynyl terminated amic acid oligomers. Amino terminated amic acid oligomers are prepared from the reaction of dianhydride(s) with an excess of diamine(s) and subsequently...http://www.google.es/patents/US5567800?utm_source=gb-gplus-sharePatente US5567800 - Imide oligomers endcapped with phenylethynyl phthalic anhydrides and polymers therefrom
Imide oligomers endcapped with phenylethynyl phthalic anhydrides and ...
