Characterization of surface modified carbon fibers and their epoxy composites by small angle x-ray scattering

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:6545088

Stoll, B; Fellers, J F; Lin, J S

This paper correlated the interlaminar shear strength of 7 different carbon fiber/epoxy composites with structural characteristics determined by Small Angle X-ray Scattering (SAXS) measurements. The carbon fibers were all of the same type but had different surface treatments. The SAXS patterns of the fibers and of the composites showed a highly nonlinear Guinier region which could not be approximated by traditional linear regression. A new approach to the Guinier approximation was developed to treat this nonlinear curve using a polynomial of second order. The radius of gyration (RG) of the fibers, as determined by this new method, correlated clearly with both the extent of the surface treatment and the interlaminar shear strength of the composite. Also the difference in scattering between a dry fiber and a glycerine soaked fiber provides a way to characterize the changes obtained by surface treatments. These methods provide new ways to estimate the efficiency of a surface treatment and its effect on the interlaminar shear strength by analyzing the SAXS patterns of the fibers.

• Research Organization: Oak Ridge National Lab., TN (USA); Bayer A.G., Leverkusen (Germany, F.R.). Geschaftsbereich Kunststoffe; Tennessee Univ., Knoxville (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6545088
• Report Number(s): CONF-861207-101; ON: DE87009687
• Resource Relation: Conference: Materials Research Society fall meeting, Boston, MA, USA, 1 Dec 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
SHEAR PROPERTIES
X-RAY DIFFRACTION
COMPOSITE MATERIALS
CORRELATIONS
EPOXIDES
FIBERS
SMALL ANGLE SCATTERING
SURFACE TREATMENTS
X RADIATION
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELEMENTS
IONIZING RADIATIONS
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
RADIATIONS
SCATTERING
360603* - Materials- Properties