THE EFFECT OF $gamma$-IRRADIATION ON POLYVINYL CHLORIDE FIBERS. PART I (in Japanese)
The physical properties of polyvinyl chloride fibers, including density, breaking strength, breaking elongation, viscosity, and thermal shrinkage were measured for samples which had been subjected to Co/sup 60/ gamma radiation in a vacuum at room temperature. The radiation doses ranged from 0 to 3 x 10/sup 7/ r. The breaking strength decreased with increasing dosage, but the effect of irradiation was not detected in densities or in breaking elongations. The degree of polymerization, which was estimated from viscosity measurements, decreased with irradiation at lower dosages, but it tended to rise at higher dosages. The effects of irradiation on the thermal shrinkage became visible only in the higher temperature range. Both the nonirradiated and the low irradiated specimens ultimately were broken because the flow of the molecular chains was accelerated by the rising temperature after showing the maximum contraction at their melting temperature (180 approximately 190 deg C). The higher the radiation dosage, the greater the flow of the molecular chains at lower temperatures, corresponding to the chain scission caused by irradiation, while for the drastically irradiated specimens, the flow stopped at about 260 deg C and at the same time the fibers began to shrink. (OID)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-013036
- OSTI ID:
- 4169142
- Journal Information:
- Sen-i Gakkaishi, Journal Name: Sen-i Gakkaishi Vol. Vol: 15, No. 2
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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