Synthesis and properties of phthalonitrile-terminated oligomeric poly(ether imide)s containing phthalazinone moiety

摘要: Three novel series of soluble and curable phthalonitrile-terminated oligomeric poly(ether imide)s containing phthalazinone moiety were synthesized from an excess amount three dianhydrides phthalazinone-based diamine, followed by reacting with 4-(3-aminophenoxy)phthalonitrile (APPh) in a two-step, one-pot reaction, respectively. The phthalonitrile oligomers cured the presence 4,4′-diaminodiphenylsulfone (DDS). crosslinked polymers characterized DSC, FT-IR elemental analysis. These groups found to be some aprotic solvents, such as chloroform, pyridine, m-cresol N-methyl-2-pyrrolidone (NMP). insoluble all solvents. thermal properties evaluated using DSC TGA showed high glass transition temperatures (Tgs) range 214–256 °C decomposition 10% weight loss (Td10%) ranging 523 553 °C. excellent stability 543 595 °C, but did not exhibit temperature upon heating 350 °C.