Effect of cure schedule on physical/mechanical properties of graphite/epoxy composites

Journal Article · Tue Apr 01 04:00:00 EST 1986 · SAMPE J.; (United States)

OSTI ID:5499701

Wenz, S M; Mijovic, J

The physical and mechanical properties of 8-ply graphite/epoxy laminates subjected to three cure cycles with varying heat-up rates are studied. Reverse-phase liquid and IR chromatography, differential scanning calorimetry, and rheological measurements are utilized to examine changes in reaction enthalpy, viscosity, and chemical structure. Glass transition temperature, tensile strength, and fracture toughness are measured; fiber volume, resin, and void content and decomposition profiles are evaluated with texture and thermogravimetric analyses. The data reveal that slower heat-up rates produce larger reaction enthalpies and composites with higher resin content; however, faster heat-up rates yield composites with lower resin content and higher glass transition temperatures. It is observed that the mechanical properties are unaffected by postcuring. 32 references.

• Research Organization: Grumman Aerospace Corp., Bethpage, NY; New York, Polytechnic Institute, Brooklyn
• OSTI ID: 5499701
• Journal Information: SAMPE J.; (United States), Journal Name: SAMPE J.; (United States) Vol. 22; ISSN SAJUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
CARBON
CARBON FIBERS
COMPOSITE MATERIALS
CURING
DATA
ELEMENTAL MINERALS
ELEMENTS
EPOXIDES
EXPERIMENTAL DATA
FIBERS
GRAPHITE
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
THERMAL ANALYSIS
VISCOSITY