Maleic anhydride (MAH) grafted polyphenylene oxide(PPO) (PPO-g-MAH) and acrylic acid (AA) grafted PPO (PPO-g-AA) were prepared via reactive extrusion with PPO macromolecular peroxide as an initiatior which prepared by β -ray pre-irradiation method. The contact angles of PPO-g-AA with grafting ratio of 0.22% and PPO-g-MAH with grafting ratio of 0.38% are 78.42° and 64.28° , respectively. The higher the grafting ratio of the graft copolymer is, the better the wettability is. PPO and its graft copolymers have the same melt temperature of 262 ℃. The tensile strength of PPO and PPO-g-AA with grafting ratio of 0.28% were both 130 MPa, the tensile strength of PPO-g-MAH with grafting ratio of 0.32% is 128 MPa. The storage modulus, loss modulus and complex viscosity of PP-g-MAH are higher than those of PPO in high frequency zone.%采用β射线对聚苯醚(PPO)进行预辐照,以产生的PPO大分子过氧化物作引发剂,利用反应挤出接枝法,将功能单体丙烯酸(AA)和马来酸酐(MAH)分别接枝到PPO分子链上,制备AA接枝PPO(PPO-g-AA)和MAH接枝PPO(PPO-g-M AH).接枝率为0.22％的PPO-g-AA,接触角为78.42.；接枝率为0.38％的PPO-g-MAH,接触角为64.28°；接枝率越大,接枝共聚物的润湿性就越好.接枝共聚物与PPO的熔融温度均为262 ℃,接枝率为0.28％的PPO-g-AA与PPO的拉伸强度均为130 MPa,接枝率为0.32％的PPO-g-MAH拉伸强度为128 MPa.在高频区,PP-g-MAH的复数黏度、储能模量以及损耗模量均大于PPO.
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