The invention relates to a high-temperature-resistant, easy-to-dissolve and
flame-retardant fluorinated polyaryl
ether nitrile resin and a preparation method thereof. Firstly,
bisphenol AF, 2,6-dichlorobenzonitrile and a catalyst are mixed to obtain a mixture, a
solvent and a dehydrating agent are added to the mixture, and an aromatic
nucleophilic substitution reaction is carried out in a protective
atmosphere, wherein the
molar ratio of
bisphenol AF to 2,6-dichlorobenzonitrile to the catalyst to the
solvent to the dehydrating agent is 1:1:(1.1-1.6):(5-11):(1.5-2); after the aromatic
nucleophilic substitution reaction is finished, the
reaction product is poured into a precipitant and is precipitated, and precipitates are dried and crushed, and after purification, the high-temperature-resistant, easy-to-dissolve and
flame-retardant fluorinated polyaryl
ether nitrile resin is obtained.
Fluorine atoms are introduced to the product, so the
solubility of polyaryl
ether nitrile is improved,and the polyaryl ether nitrile can be dissolved in low-boiling-point organic solvents such as
acetone,
chloroform,
tetrahydrofuran and the like; and because of containing of F atoms, the polyaryl ether nitrile resin has good
flame retardancy,
thermal stability and mechanical properties.