Abstract: In this paper the tensile fracture-surface of octavinyl-polyhedral oligomeric silsesquioxane(OVP)/ABS composites was observed using a field emission scanning electron microscopy (SEM). The dispersion of OVP in ABS were analyzed，the influence of OVP content on the micro-morphology of fracture-surfaces of composites were investigated as well. When an initiator was introduced, OVP was grafted onto ABS, resulting in better dispersion and improved mechanical properties.

Key words: COLOR: black, FONT-FAMILY: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">octavinyl-polyhedral oligomeric silsesquioxaneCOLOR: black, FONT-FAMILY: 宋体, mso-ascii-font-family: Arial, mso-hansi-font-family: Arial, mso-bidi-font-family: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">, COLOR: black, FONT-FAMILY: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">acrylonitrile butadiene styrene compositeCOLOR: black, FONT-FAMILY: 宋体, mso-ascii-font-family: Arial, mso-bidi-font-family: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">, COLOR: black, FONT-FAMILY: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">tensile fracture-surfaceCOLOR: black, FONT-FAMILY: 宋体, mso-ascii-font-family: Arial, mso-bidi-font-family: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">, COLOR: black, FONT-FAMILY: Arial, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">morphology