EFFECT OF IONIZING RADIATION ON THE STRUCTURAL CHANGES IN RUBBER-PLASTIC SYSTEMS

Journal Article · Mon Apr 01 04:00:00 EST 1963 · Vysokomolekul. Soyedin.

OSTI ID:4695940

Blokh, G A; Zhurko, V A; Vyazankina, M A; Vas'kovskaya, M A; Meleshevich, A P; Bronshteyn, F V; Tsipenyuk, E V

Structural changes produced by ionizing radiation in doses of 1 to 100 Mr in rubber-plastic systems were studied. The changes in properties were evaluated from thermomechanical curves in the range from about 60 to 220 deg C and from swelling data. The experiments were conducted with systems of sodium butadiene, butadiene- styrene, or natural rubber and low- or high-pressure polyethylene or polystyrene (rubber: plastic ratios, 80: 20, 50:50, and 20: 80) irradiated in air without heating. The thermomechanical curves of individual nonirradiated and irradiated systems differ sharply from one another. At a given temperature and radiation dose, network structure formation, indicated by a loss of deformability and by the absence of viscous flow, was shown to be induced by irradiation. The density of cross links in individual systems was shown to increase with an increase of the dose and to depend on the nature of the rubber and the rubber-to-plastic ratio. In polymers containing phenyl groups radioinduced structural changes proceeded slower and required higher radiation doses. Analysis of the resuits of the study indicates that ionizing radiation apparently causes a covulcanization of the rubber and the plastic and is accompanied by a change in the physical and mechanical properties of the system: a sharp decrease in plasticity, a decrease in swelling, and increases in hardness, tensile strength, and wear resistance. It was concluded that irradiation of combinations of rubbers and plastics in predetermined ratios makes possible the production of materials with the desired improved properties. (OTS)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-027931
• OSTI ID: 4695940
• Journal Information: Vysokomolekul. Soyedin., Journal Name: Vysokomolekul. Soyedin. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
BUTADIENE
CROSS-LINKING
DUCTILITY
EXPANSION
HARDNESS
IONS
IRRADIATION
LOW TEMPERATURE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
POLYETHYLENES
POLYMERIZATION
POLYMERS
POLYSTYRENE
PRESSURE
RADIATION DOSES
RADIATION EFFECTS
RUBBER
SODIUM COMPOUNDS
STYRENE
TENSILE PROPERTIES
VULCANIZATION
WEAR