Accession Number : ADA288344

Title :   Interfacial Mobility and Its Effect on Flexural Strength and Fracture Toughness in Glass-Fiber Fabric Reinforced Epoxy Laminates.

Descriptive Note : Rept. for 1 Jan-19 Nov 94,

Corporate Author : MISSOURI UNIV-ROLLA DEPT OF CHEMISTRY

Personal Author(s) : Wang, Timothy W. ; Blum, Frank D.

PDF Url : ADA288344

Report Date : 21 NOV 1994

Pagination or Media Count : 8

Abstract : Constant-strain-rate mechanical testing was used, to study the fracture mechanical characterization of E-glass fiber fabric reinforced epoxy composites. Testing was performed ) as a function of the silane coupling agent used with compact tension (CT) specimens for racture toughness and rectangular specimens for flexural strength. Two silane coupling agents, y-aminopropyltriethoxysilane (APS) and y-aminobutyltrithoxy-silane (ABS) were used for this purpose. The fracture toughness,K1c, of ABS treated composites was shown to be lower than that for APS treated composites. Treatment with either is better than using bare glass. A three point bend test showed the flexural strength and modulus were increased in order of untreated<ABS<APS treated composites in both dry and wet conditions. Since these silanes have similar chemistry, we believe that the difference is due to the interfacial mobility of the coupling agent layer.

Descriptors :   *FIBER REINFORCED COMPOSITES, *FRACTURE(MECHANICS), *FLEXURAL STRENGTH, *EPOXY LAMINATES, TEST AND EVALUATION, COUPLING(INTERACTION), MOBILITY, INTERFACES, LAYERS, TOUGHNESS, BENDING, GLASS FIBERS, RECTANGULAR BODIES, SILANES, TENSION.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE