The viscoelasticity of curing thermosets

Conference · Mon Jan 01 00:00:00 EST 1990

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 Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7152005
• Report Number(s): SAND-90-0077C; CONF-9005107-1; ON: DE90006535
• Resource Relation: Conference: ANTEC '90: Society of Plastics Engineers meeting, Dallas, TX (USA), 7-11 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

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