PHYSICAL PROPERTIES OF IRRADIATED POLYETHYLENE (thesis)

Technical Report · Sun Jan 01 04:00:00 EST 1961

OSTI ID:4833534

Sweet, Jr, F B

Branched-chain polyethylene in film and monofilament fonnn was irradiated in a nitrogen atmosphere by gamma rays from a Co/sup 60/ source. Tests were conducted to determine changes in physical properties attributable to molecular cross-linking resulting from gamma radiation. Monofilament tensile strength and elongation increased with increased gamma dosage up to a certain total dosage, after which the two properties decreased. The difference in elongation between the longitudinal direction and transverse direction of extruded fllm was reduced by irradiation. Film tests revealed that work done prior to rupture increased for the longitudinal extruded direction and decreased for the transverse direction up to a certain dosage, after which work done in the longitudinal direction also decreased. Film burst tests showed that irradiation increases work done prior to rupture. It was concluded that changes in physical properties caused by irradiation are dependent upon the specimen's degree of molecular orientation as well as on total gamma dosage. (auth)

• Research Organization: North Carolina State Coll., Raleigh
• NSA Number: NSA-16-000566
• OSTI ID: 4833534
• Report Number(s): AD-255907
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COBALT 60
CROSS-LINKING
DEFORMATION
DISTRIBUTION
EXTRUSION
FILMS
GAMMA SOURCES
INERT GASES
IRRADIATION
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
NITROGEN
POLYETHYLENES
RADIATION DOSES
RADIATION EFFECTS
TENSILE PROPERTIES