New acetylene‐terminated phenylquinoxaline oligomers

摘要

AbstractA series of new acetylene‐terminated phenylquinoxaline oligomers and diacetylene compounds have been prepared utilizing 4‐(3‐ethynylphenoxy)benzil. The amorphous materials with molecular weights from 500 to 1460 exhibited softening in the 25–160°C range with a strong polymerization exotherm reaching a maximum at 270–290°C. The addition nonvolatile cure provides materials which show excellent thermoxidative stability and processability for high‐temperature matrix and ad