【摘要】 采用热塑性树脂酚酞型聚芳醚酮改性环氧树脂共混体系，并对其化学结构组成、断面微观形貌及热稳定性进行分析。结果表明，当聚芳醚酮含量较高时，环氧树脂共混体系存在排列紧密、彼此相连的均匀球形分散相，为PAEK树脂包覆球状热固性树脂的相结构。在应力的作用下，这种球粒相结构可以起到吸收能量、阻碍裂纹扩展的作用，从而提高了断裂能，使材料的断裂韧性得到提高。而且，随着热塑性PAEK树脂质量分数的增加，球状的富环氧颗粒逐渐减小。随着PAEK树脂的含量的增加，PAEK/EP共混体系的耐热性能呈先增大后减小的趋势。当PAEK树脂的含量为40份时，PAEK/EP共混体系的T_HRI达到最大值。更多还原

【Abstract】 The thermal stabilities of epoxy resin matrix composite, which were modified by polyaryletherketone（PAEK）, were investigated. The results indicated that a uniform spherical dispersed phase, which was the phase structure of PAEK resin coated with spherical thermosetting resin, arranged closely and connected to each other when the content of PAEK was high. Moreover, spherical rich epoxy particles present a smaller trends with the increase of mass fraction of thermoplastic PAEK. The spherical phase structure could absorb energy and hinder the crack propagation, thus the fracture energy and toughness were improved. Moreover, the diameter of the spherical epoxy-rich particles tends to reduced gradually with the increase of the mass fraction of PAEK. Based on the results of thermal stability experiments, it could be obtained that the heat-resistance of the PAEK/epoxy resins increased first and then decreased with the increase of PAEK content. The heat-resistance index(T_HRI) of PAEK/EP blends was the highest when the content of PAEK resin was 40 phr.更多还原