| abstract |
The invention discloses an AB-type modified PPTA monomer and its preparation and application. The structure of the AB-type modified PPTA monomer is shown in formula (I). The AB-type modified PPTA monomer is Polycondensation can produce modified PPTA resin, its structure is shown in formula (VII), in formula (I) or (VII), R is H, CH 3 or C 2 H 5 ; R 1 is CH 3 , Cl or Br ; R 2 is H or OH. The present invention introduces a 3-methyl group on the benzene ring of the AB-type modified PPTA monomer, which can improve the solubility of the modified PPTA material prepared therefrom in organic solvents, and can obtain improved thermal properties. The 3-position halogen is introduced into the benzene ring, which can increase the flame retardancy of the modified PPTA material. At the same time, the removal of HCl can cause crosslinking between the molecules and increase the axial resistance of the material. In addition, the introduction of ortho hydroxyl groups on the benzene ring can improve the compression resistance, composite bonding performance, fatigue resistance, light resistance, and flame resistance of the modified PPTA material prepared from it. |