Bis(3-aminophenyl)methyl phosphine oxide-based (methyl) nadicimide resins

✍ Scribed by Sarfaraz Alam; L.D. Kandpal; I.K. Varma

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 192 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970801)65:5<861::aid-app3>3.0.co;2-l

✦ Synopsis

Ten nadicimide/methyl nadicimide end-capped oligomeric resins were prepared by reacting endo-5-norbornene-2,3-dicarboxylic acid anhydride (methyl nadic anhydride), pyromellitic dianhydride (PMDA)/3,3,4,4-benzophenone tetracarboxylic acid dianhydride (BTDA)/2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6F), and bis(3-aminophenyl) methyl phospine oxide (BAP) in glacial acetic acid/ acetone. Structural characterization of the resins was done by elemental analysis, IR, and 1 H-NMR. Multistep decomposition was observed in the TG scan of uncured resins in a nitrogen atmosphere. Residual weight at 800ЊC depended on the structure and ranged between 25 and 51%. Isothermal curing of the resins was done at 300ЊC for 1 h in an air atmosphere. These cured resins were stable to 350 { 30ЊC and decomposed in a single step above this temperature. The char yield of the resins increased on curing and was in the range 34-70%.