SBS的动态疲劳老化特性  

Dynamic Fatigue Characteristics of SBS

作　　者：陈健[1] 刘钰馨[1] 杨其[1] 李光宪[1] 高灵强[1] 刘小林[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2010年第9期41-44,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金重点项目(50533080)

摘　　要：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。The effects of different frequency,amplitude and ultraviolet light on the dynamic fatigue behavior of SBS were investigated. The surface structures and morphology of the sample under different conditions were researched. The results show that with the increase of frequency and amplitude,the fatigue life is gradually reduced,and which is rapidly declined with ultraviolet light. There is remarkable change in the intensity of infrared spectra （IR）peak under the exposure of UV light. The scanning electron microscope （SEM） results indicate that the cracks are appeared on the surface of samples and the surfaces are seriously destroyed in presence of UV light.

关 键 词：动态疲劳 频率 振幅 物理老化 化学老化 

分 类 号：O631.33[理学—高分子化学]