The viscoelasticity of curing thermosets

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:7152005

Adolf, D.; Martin, J. E.

As a crosslinking polymer cures, dramatic changes in molecular architecture occur. These structural changes in turn affect the viscoelastic behavior of the material. At a critical extent of reaction (the gel point), the polymer undergoes a transition from a viscous liquid to an elastic solid. We have monitored the evolution of structure and viscoelasticity in an epoxy encapsulant used at Sandia, the diglycidyl ether of Bisphenol A (BADGE) cured with diethanolamine (DEA). The structure evolves according to percolation theory, and the viscoelasticity evolves according to out dynamic scaling theory for branched polymers. 7 refs., 4 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7152005
• Report Number(s): SAND-90-0077C; CONF-9005107--1; ON: DE90006535
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603* -- Materials-- Properties
CURING
EPOXIDES
EQUATIONS
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POLYMERS
PREDICTION EQUATIONS
RELAXATION
STRESS RELAXATION
VISCOSITY