研究了SBS在不同频率、不同振幅及紫外作用下的动态疲劳行为.应用红外和扫描电镜(SEM)研究了试样表面结构和形貌的变化.结果表明,随着频率和应变的增大,疲劳寿命逐渐降低,紫外能加速材料的断裂失效;单纯改变物理因素对试样表面影响不大,而紫外照射后红外谱图中峰强明显发生变化;SEM结果显示试样表面在疲劳后出现不同程度的裂纹,而施加了紫外辐照的试样表面裂纹则变得明显,破坏严重.
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