| abstract |
The invention discloses a phthalonitrile-terminated polyarylether nitrile oligomer containing a fluorene structure, a cured product and a preparation method thereof. The phthalonitrile-terminated polyarylether nitrile oligomer containing fluorene structure has a lower melting point and better solubility due to chain segments of different lengths and bulky side group structure, and is soluble in DMF, NMP It can also be dissolved in THF, dichloromethane and mixed solvents of toluene and acetonitrile. The phthalonitrile-terminated polyarylether nitrile cured product containing fluorene structure has excellent thermal stability and mechanical properties, the 5% decomposition temperature under nitrogen atmosphere is 499-528°C, and the residual weight rate at 1000°C is 69 ‑73.2%, and the bending strength is higher than 500MPa. The phthalonitrile-terminated polyarylether nitrile oligomer containing fluorene structure, the cured product and the preparation method thereof of the present invention are simple and controllable, and can be applied to industrial production. |