摘要
用斜削双悬臂梁试件测试环氧-聚砜体系的断裂韧性(G_1c)表明:该体系有较高的G_1c值,并且G_(IC)与G_(Ia)相近,也就是其断裂韧性与止裂韧性相当;比较该体系G_(IC)的温度谱和动态力学性能(DMA)的温度谱说明,该体系韧性与其粘弹性有关;分析扫描电镜(S^-M)的照片可以看出,该体系由韧性聚合物的连续相包络热固性树脂固化球粒,即“网络-球粒”结构,这种结构是导致该体系高韧性的原因。
In this paper the fracture energy GIC of epoxy-PSF system has been tes-ted with TDCB (Tapered-double-cantilever beam) samples. The results show that this system not only has a high GIC value, but also .GI and GI2 are almost equal. Comparing the GIc temperature char with dynamic mechanical properties(DMA),we find that the toughness of the system relates to its visco-elastic properties. From the SEM photographs, a structure that the tenacious polymer as an uninterrupted phase,wraps thermosetting spherule,i.e. a'networ-kmicrospherule' structure was observed. It is this structure that makes the GIC of epoxy-PSF system high.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1991年第3期37-42,共6页
Acta Materiae Compositae Sinica
