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以4,4′-二氨基二苯甲烷型双马来酰亚胺(BDM)、二胺基二苯甲烷(DDM)及环氧丙烷(PO)为主要原料合成了BDM-DDM-PO三元共聚物,并以此作为BDM的增韧改性剂制备BDM-DDM-PO/BDM复合材料。着重探讨了BDM-DDM-PO用量对复合材料的结构特征、韧性和热性能等影响。结果表明:当w(BDM-DDM-PO)=5.0%时,BDM-DDM-PO/BDM复合材料的热性能略高于纯BDM体系,但前者的冲击强度(14.39 kJ/m2)和弯曲强度(97.4 MPa)分别比后者提高了39.71%和6.21%,前者的冲击断面呈韧性断裂特征,说明适量的增韧改性剂可有效提高BDM-DDM-PO/BDM复合材料的韧性。
BDM-DDM-PO ternary was synthesized with 4,4’-diaminodiphenylmethane bismaleimide (BDM), diaminodiphenylmethane (DDM) and propylene oxide (PO) as main raw materials Copolymer and BDM as a toughening modifier to prepare BDM-DDM-PO / BDM composite material. The effects of the content of BDM-DDM-PO on the structural characteristics, toughness and thermal properties of the composites were mainly discussed. The results show that the thermal properties of BDM-DDM-PO / BDM composites are slightly higher than that of pure BDM system when the content of w (BDM-DDM-PO) = 5.0%, but the impact strength (14.39 kJ / (97.4 MPa) increased by 39.71% and 6.21% respectively compared with the latter. The impact fracture surface of the former showed ductile fracture characteristics, indicating that proper amount of toughening modifier can effectively improve the toughness of BDM-DDM-PO / BDM composites.