The SEM appearance of ruptured surfaces for impacting of the castings showed that the prepolymerized gellike DAIP is beneficial to producing of fringed crackings on ruptured surfaces.

• 扫描电子显微镜对浇铸体冲击断面的观察显示:将DAIP预聚至凝胶状态有利于冲击断面璎珞状裂纹的产生。