聚芳醚酮改性苯并恶嗪树脂相结构与冲击性能研究  

Phase Structure and Impact Toughness of Benzoxazine Modified by Polyaryletherketone

作　　者：张明[1] 刘立朋[1] 安学锋[1] 益小苏[1] 

机构地区：[1]北京航空材料研究院先进复合材料国防科技重点试验室,北京100095

出　　处：《工程塑料应用》2012年第7期9-12,共4页Engineering Plastics Application

基　　金：国家973课题项目(2010CB631101);国防科技重点实验室基金项目(9140C4405031002)

摘　　要：以热塑性聚芳醚酮(PAEK)改性的热固性苯并恶嗪树脂为对象,用扫描电子显微镜观察了树脂体系分相后的相结构并对其进行测量分析,用动态机械热分析仪和动态数字化冲击仪测试了改性树脂浇铸体的耐热性和冲击韧性。结果表明,加入PAEK后体系发生了旋节线相分离而形成双连续相结构,富苯并恶嗪的自相似特征步长由PAEK用量为5份时的0.49μm降低到35份时的0.22μm;因高PAEK含量的改性体系形成了细小的相结构(小于0.5μm),使得位错绕过而可能无法形成较强的"钉扎"效应,导致树脂体系的韧性提高幅度较小;但PAEK与苯并恶嗪的相容性较好,改性苯并恶嗪树脂体系并未因PAEK的加入而降低耐热性。The benzoxazine modified by polyaryletherketone （ PAEK ）were selected as raw materials in this study.The scanning electron microscope was employed to detect the phase structure of the brittle fracture section.The size of the phase morphology was measured manually.The digital impact testing apparatus and the dynamic mechanical thermal analyzer was then carried out respectively to obtain the impact toughness and heat resistance.The results suggested that the spinodal phase decomposition occured in the curing procedure of the modified benzoxizine, leading to the self-similar wavelength varying from 0.49 μm when the thermoplastic content was 5 phr to 0.22μ m when the thermoplastic content was 35 phr. In the high thermoplastic content system, the generated tiny phase structure （ less than 0.5μ m ）might not produce a strong effectiveness of the crack pinning to improve the impact toughness because of the dislocation bypassing.The single and stable DMA peak value declared an excellent compatibility and thermal-resistance maintenance of the blended system.

关 键 词：苯并恶嗪 聚芳醚酮 相结构 冲击韧性 

分 类 号：TB324[一般工业技术—材料科学与工程]