论文部分内容阅读
本文研究了液体端羧基丁腈橡胶改性多官能环氧树脂增韧体系的断口形貌和增韧机理。通过扫描电镜观察表明,本增韧体系是以橡胶为主的分散相和以树脂为连续相的两相体系。着重讨论分散相—橡胶粒子的结构形态和界面粘附力对增韧效果的影响,提出裂纹通过橡胶粒子扩展时的几种模型。结合胶接性能测定结果说明了该增韧体系具有较高强度和良好韧性的原因。
In this paper, the fracture morphology and toughening mechanism of the liquid carboxyl-terminated nitrile rubber modified polyfunctional epoxy toughened system were studied. Scanning electron microscopy showed that the toughening system is a rubber-based disperse phase and a two-phase system with resin as the continuous phase. Focusing on the influence of the dispersed phase - the morphology of the rubber particles and the interfacial adhesion on the toughening effect, several models of crack propagation through the rubber particles are proposed. The result of the measurement of the bonding performance shows that the toughening system has the advantages of high strength and good toughness.