Thermoset High-Temperature Systems Based on the Homolytic Polymerization of Benzocyclobutene Aromatic Imide Monomers and Oligomers

A new series of bisbenzocyclobutene-terminated aromatic imide oligomers has synthesized from the condensation reaction of 4- aminobenxocyclobutene and the perspective dianhydride in refluxing acetic acid toluene. The differential scanning calorimetric studies of the foregoing monomers indicated that polymerization exotherms began at 229-250 C and reached their maxima at 258-263 C. The cured samples 250-254 C Nitrogen 8 hrs were surprisingly stable toward thermooxidative degradation only 7- to 10- percent weight loss was observed after 200 hrs in air at 314 C 600 F. Keywords Thermosets Benzocyclobutene High temperature Imide Oligomers Butenes.