Synthesis and characterization of benzocyclobutene-terminated imides with high organosolubility

Abstract Benzocyclobutene resins play an important role in microelectronic industry owing to their excellent physical and chemical properties. In our work, three novel benzocyclobutene-terminated imide monomers were synthesized via the reaction of 1-aminomethyl benzocyclobutene with various aromatic dianhydrides. The monomers exhibited good processability with superior solubility and low melting points ( 2 with an exothermic peak in differential scanning calorimetry (DSC) curves ranging from 217.3 °C to 287.7 °C. Highly crosslinked resins obtained at 150–300 °C exhibited superior tensile strength (>74.3 MPa), outstanding thermal stability (T d  > 466 °C in N 2 ), high glass transition temperature (>278 °C), high storage modulus (>3.25 GPa at 30 °C), low dielectric constant (