AbstractA series of UV‐autocurable 3,3′,4,4′‐benzophenone tetracarboxylic dianhydride (BTDA) and benzophenone tetracarboxylic acid (BTAc)‐based multiacrylate resins containing pendant glycidyl methacrylate (GMA) or glycidyl acrylate (GA) and 2‐hydroxyethyl acrylate (HEA) or 2‐hydroxyethyl methacrylate (HEMA) were synthesized. The effects of the acrylic functional groups, the moles of GMA, and the molar ratio of HEMA/HEA on their properties were investigated. The prepared autocurable resins are cured rapidly when exposed to UV or sunlight radiation without addition of any photoinitiator or Photosensitizer and the acrylate‐type resin resulted in a lower thermal curing temperature and a fast curing rate. Increasing the moles of GMA or the molar ratio of HEMA/HEA on reaction leads to a higher cross‐linking density and resulted in film with a higher Young's modulus, breaking strength, and lower elongation. The methacrylate‐type resin cured to a very hard, but brittle film with a higher Young's modulus and lower elongation. However, the acrylate‐type resin cured to a hard tough film with a lower Young's modulus and higher elongation. The cured methacrylate‐type resin results in a lower weight loss at temperature below 300°C due to a higher cross‐linking density and lower residual weight percent at 600°C due to the lower percent of benzene rings in the resin. The film properties of the resins coated on steel plates were also investigated.
展开▼
