Nonconjugated conductive polymers for protection against nuclear radiation including radioactive iodine
View Patent ↗Nonconjugated conductive polymers absorb radioactive iodine, therefore are useful for protection against nuclear radiation. These polymers have at least one double bond per repeat unit. The ratio of the number of double bonds to the total number of bonds along the polymer chain is less than half. Examples of nonconjugated conductive polymers include: cis-1,4-polyisoprene (natural rubber), trans-1,4-polyisoprene (gutta percha), polybutadiene, polydimethyl butadiene, poly(b-pinene), styrene butadiene rubber (SBR), polyalloocimene, polynorbornene and many others. Through interaction with iodine atoms the double bonds in the nonconjugated polymers transform into radical cations leading to a dark color. The iodine atoms remain (immobile) bound to the polymer chain through the charge-transfer interaction, these polymers are very inexpensive and can be easily processed into any shape, structure and size. Therefore, these are useful for protection against nuclear radiation including radioactive iodine. These polymers when used as a thick cover can provide safe storage of nuclear waste materials including spent fuel rods.
1. A process for protection against nuclear radiation including radioactive iodine by using at least one nonconjugated polymer to absorb iodine, including radioactive iodine.
2. The process of claim 1 in which the nonconjugated polymer is selected from the group consisting of cis-1,4-polyisoprene (natural rubber), trans-1,4-polyisoprene (gutta percha), poly(β-pinene), polybutadiene, poly(dimethyl butadiene), styrene-butadiene-rubber (SBR), polyalloocimene and polynorbornene.
3. The process of claim 2 in which the nonconjugated polymer is cis-1,4-polyisoprene (natural rubber).
4. The process of claim 2 in which the nonconjugated polymer is trans-1,4-polyisoprene (gutta percha).
5. The process of claim 2 in which the nonconjugated polymer is poly(β-pinene).
6. The process of claim 2 in which the nonconjugated polymer is polybutadiene.
7. The process of claim 2 in which the nonconjugated polymer is poly(dimethyl butadiene).
8. The process of claim 2 in which the nonconjugated polymer is styrene-butadiene-rubber (SBR).
9. The process of claim 2 in which the nonconjugated polymer is polyalloocimene.
10. The process of claim 2 in which the nonconjugated polymer is polynorbornene.
11. A process for protection against nuclear radiation, including radioactive iodine, in which an existing structure in which radioactive material is contained, by forming a coating or substrate on the existing structure from a material formed at least in part from at least one nonconjugated polymer.