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The effect of radiation on the properties of silicone rubber

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Abstract

As a result of γ -radiation, silicone rubber undergoes a series of changes due to radiation cross-linking. The modulus of elasticity increases linearily with a dose up to 150–200 megarads. The vitrification temperature (− 120 to- 125 ° C) hardly changes up to 100 megarads and at 270 megarads it is −110 to −115 ° C. With cross-linking, the rate of crystallization and degree of crystallinity decrease. The melting point falls from − 35 ° C for the initial material to − 55 ° C for rubber Irradiated with a dose of 40 megarads. A dose of 100 megarads practically completely eliminates crystallization. This dose produces rigid rubbers with a modulus of 200– 250 kg/cm2 and a high degree of frost resistance, (Tg ≈ −125 ° C), but with a very small breaking stretch (15–20%) with a strength of 30–40 kg/cm2.

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Authors
  1. Iu. S. Lazurkin
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  2. G. P. Ushakov
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Lazurkin, I.S., Ushakov, G.P. The effect of radiation on the properties of silicone rubber. The Soviet Journal of Atomic Energy 4, 365–371 (1958). https://doi.org/10.1007/BF01479779

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  • DOI: https://doi.org/10.1007/BF01479779

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