Characterization and aging of rubber modified epoxies

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

OSTI ID:5949242

Sayre, J A

A transmission electron microscopy study of rubber modified epoxy cured with diethanol amine has shown that a broad distribution of particle sizes exists. Only 50 vol % of the particles have diameters greater than 0.1 ..mu..m. The resin/rubber interface was within the 500 A resolution limit of the method employed. A model was developed to predict physical properties of rubber modified epoxies over the life of weapon systems. Preliminary results show that the chief aging phenomenon occurring is increased crosslink density of the epoxy matrix. No changes in the rubber phase have been detected. The effect of increased crosslink density has been higher volume resistivity at 66/sup 0/C, increased tensile strength, and decreased ultimate elongation.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5949242
• Report Number(s): SAND-79-1858C; CONF-790967-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360405* -- Materials-- Polymers & Plastics-- Degradation & Erosion-- (-1987)
AGING
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CROSS-LINKING
ELASTOMERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELONGATION
EPOXIDES
MECHANICAL PROPERTIES
MICROSCOPY
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PARTICLE SIZE
PHYSICAL PROPERTIES
POLYMERIZATION
POLYMERS
RUBBERS
SIZE
TENSILE PROPERTIES
WEAPONS