Morphology of rubber modified epoxy encapsulants

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6297798

Sayre, J A

Examination of rubber modified epoxy, cured with diethanol amine, via the transmission electron microscope has shown that a broad distribution of rubber particle sizes exists. The average particle size for particles greater than .1 ..mu..m was found to be .8 ..mu..m. A significant population of particles was found whose diameters are less than .1 ..mu..m. Examination of the particle interface showed that the interface between the dispersed phase and the epoxy matrix was sharp within the accuracy of the method used. The morphology observed was compared against morphologies which have been purported to result in toughening via shear banding and crazing. It was found that the observed particle size distribution did not preclude toughening by these mechanisms.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6297798
• Report Number(s): SAND-79-0158C; CONF-790518-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360302* -- Composite Materials-- Structure & Phase Studies-- (-1987)
ELASTOMERS
ELEMENTS
ENCAPSULATION
EPOXIDES
INTERFACES
METALS
MORPHOLOGY
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OSMIUM
PARTICLE SIZE
PLATINUM METALS
POLYMERS
REFRACTORY METALS
RUBBERS
SIZE
SPHERES
THERMAL CYCLING
TRANSITION ELEMENTS