TWI839757B

The present application discloses a polyfunctional poly(arylene ether) resin, having a number average molecular weight of 1000-6000, preferably a number average molecular weight of 1500-3000, and a structural formula shown in Formula (1) below: in Formula (1), R1, R2, R3 and R4 are each independently selected from hydrogen, halogen, aryl or C1-C12 alkyl; R5 and R6 are each independently selected from hydrogen, methyl or ethyl; and m and n are each independently selected from integers of 1 to 50. The present application further discloses a preparation method of the polyfunctional poly(arylene ether) resin, including the following steps: adding a monophenol compound and a polyphenol compound to a good solvent of poly(arylene ether) to obtain a monomer solution, mixing the monomer solution with a catalyst while introducing oxygen to carry out polymerization, and after the polymerization is finished, adding a terminator to obtain a reaction liquid I; and carrying out liquid-liquid separation on the reaction liqui