Novel poly(arylene ether) resin and preparation method therefor

A method for preparing a novel poly(arylene ether) resin, comprising the following steps:

• adding poly(arylene ether) and a polyphenol compound to a good solvent of poly(arylene ether), then adding peroxide to carry out a first reaction, cooling the resulting mixture after the completion of the first reaction, and pouring the obtained first reaction liquid into a poor solvent to precipitate bis(hydroxyl) poly(arylene ether);
• and
• then adding a blocking agent and a catalyst to the bis(hydroxyl) poly(arylene ether) to carry out a second reaction, and after the completion of the second reaction, pouring the obtained second reaction liquid into the poor solvent to precipitate the novel poly(arylene ether) resin shown in Formula (1), wherein the resin has a number average molecular weight of 1000-4000, preferably 2000-3000, and an intrinsic viscosity of 0.04-0.20 dL/g, preferably 0.06-0.14 dL/g;
• wherein in Formula (1), R1, R2, R3, and R4 are selected from hydrogen, halogen or C1-C12 alkyl;
• R5 and R6 are selected from hydrogen or methyl;
• R7-R9 are selected from hydrogen or C1-C18 alkyl;
• m and n are integers of 1 to 50;
• preferably, the halogen is bromine or chlorine;
• the C1-C12 alkyl is C1-C12 straight-chain alkyl or branched-chain alkyl,
• preferably, the C1-C12 alkyl is methyl,
• preferably, R7 is C1-C6 alkyl;
• more preferably, R7 is C1-C4 alkyl;
• and
• preferably, R5 and R6 are methyl.