Compatible polyamide-polyphenyl ether composition and preparation method thereof

The invention relates to a compatible polyamide-polyphenyl ether composition and a preparation method thereof. The compatible polyamide-polyphenyl ether composition is prepared from raw materials of 30 to 70 parts by weight of a polyamide, 30 to 70 parts by weight of a polyphenyl ether, 1 to 10 parts by weight of an isocyanate group-containing compound, 0 to 10 parts by weight of one or more impact modifiers, and 0.1 to 1.0 part by weight of processing auxiliary agents. The preparation method comprises the following steps of proportioning the raw materials according to the weight part ratio, uniformly mixing the raw materials by a high-speed mixer, feeding the mixed raw materials into a double-screw extruder by a main feeding device, and carrying out melting reaction extrusion and granulation to obtain the compatible polyamide-polyphenyl ether composition. The method utilizes an isocyanate group-containing oligomer as a reactive compatibilizer and a bi-component grafted copolymer is obtained by a melting extrusion in-situ reaction and thus interfacial tension of a polyamide and a polyphenyl ether is reduced and the compatible polyamide-polyphenyl ether composition is obtained. The preparation method of the compatible polyamide-polyphenyl ether composition is simple and feasible. The compatible polyamide-polyphenyl ether composition has excellent integrated performances.