| 摘要 |
Described is a self-indicating instant radiation dosimeter (1001) for monitoring high energy radiations, such as X-ray. The dosimeter contains a radiation sensitive, color changing, indicating composition (10), e.g., a diacetylene (R—C≡C—C≡C—R′, where R and R′ are substituents groups) or a radiochromic dye, a polymeric binder (20) and optionally a shelf life extender (50) or an activator (40). The radiation sensitive composition (10) changes color instantly when exposed to high energy radiation. The dose is estimated by comparing the color with a color reference chart or more accurately with a spectrophotometer or an optical densitometer. The radiation sensitive composition (10) is protected from low energy radiation such as UV light, by a layer of low energy absorbing materials, such as UV absorbers. |
| 主权项 |
1. A composition comprising a diacetylene, a catalyst, and at least one additive selected from the group consisting of a heat stabilizer, a reactive species quencher, a free radical scavenger, an oxygen scavenger, an antioxidant, a reaction inhibitor, a thermo-oxidation inhibitor, a photo-oxidation inhibitor, a hydroperoxide decomposer, a H-donor, a UV stabilizer, a UV absorber, a UV reflector and a fluorescent optical brightener and further comprising a promoter, wherein said promoter is N,N-dimethyl-p-toluidine. |
