System for vacuum pouring of epoxy tensile and impact specimens with a study of the behavior of these specimens at 77 K and 293 K

Technical Report · Fri Mar 31 04:00:00 EST 1978

DOI:https://doi.org/10.2172/5071994· OSTI ID:5071994

Fitzpatrick, C. M.; Stoddart, W. C.T.

The purpose of the investigation was to establish a suitable technique for vacuum pouring of epoxy test specimens and to study the behavior of these specimens at 77 K and 293 K. A series of tensile and impact tests was conducted using specimens made from the following resins: Epon 828, Epon 871, and Epon curing agent Z. These materials are of general interest to designers of magnets for cryogenic service. Tests of the specimens were carried out at 77 K and 293 K. The 77 K data indicate that tensile strength increases proportionally with the increase of Epon 871 relative to Epon 828. When the mixture includes more than 90% Epon 871, impact testing at 293 K becomes practically impossible due to the rubbery condition of the material. However, when tested at 77 K, this same mixture evinces high tensile strength. When optimum data are sought over a wide range of temperatures, 77 K to 293 K, it appears that a mixture of 70% Epon 871, 30% Epon 828 with 13 pph of curing agent Z or 50% Epon 871, 50% Epon 828 with 15 pph curing agent Z offers the best compromise in tensile strength, modulus of elasticity, and impact resistance.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5071994
• Report Number(s): ORNL/TM-5493/R1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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ELASTICITY
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EPOXIDES
EQUIPMENT
FABRICATION
IMPACT TESTS
LOW TEMPERATURE
MAGNET COILS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PERFORMANCE TESTING
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RESINS
TENSILE PROPERTIES
TESTING