Effect of temperature and cross-linkings on the flow behavior of a rubberized epoxy resin. Final technical report

Technical Report · Mon May 02 00:00:00 EDT 1977

OSTI ID:7295231

Mukherjee, A K; Ling, S

The effect of cross-linking and temperature on the flow behavior of rubber modified phenolic epoxy resin cured with amine mixture was investigateed between the temperature range of 296/sup 0/K to 406/sup 0/K by means of creep test and tensile test. This epoxy matrix system may be deformed by reorientation of chain segments between cross-links. Deformation in these segments may be restrained by dispersed rubber spheres. Both the creep curves and the activation energy for flow suggest that the degree of cross-linking may have increased during testing. This increase is both temperature and stress aided. Over the conditions studied the flow of such a system can be approximated by: epsilon/sub T/ = A(sigma/sub U//sigma/sub TR/)/sup n/ exp(-Q/sub T//RT), where epsilon/sub T/ is true strain rate, A is the structural factor (a constant), sigma/sub U/ is ultimate stress, sigma/sub TR/ is ''stress at transition'', n is mechanism dependent stress exponent, Q/sub T/ is true activation energy, R is a gas constant, and T is the absolute temperature.

• Research Organization: California Univ., Davis (USA). Dept. of Mechanical Engineering
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7295231
• Report Number(s): UCRL-13732
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EPOXIDES
FLOW STRESS
RUBBERS
CREEP
CROSS-LINKING
DEFORMATION
MEDIUM TEMPERATURE
CHEMICAL REACTIONS
ELASTICITY
ELASTOMERS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
STRESSES
TENSILE PROPERTIES
THERMOELASTICITY
360403* - Materials- Polymers & Plastics- Mechanical Properties- (-1987)