CR-39 (poly(diethylene glycol bis(allyl carbonate))) under γ-rays and proton beams
| Autor: | J.L. Decossas, J.C. Vareille, C. Darraud-Taupiac, B. Bennamane |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
chemistry.chemical_classification
Nuclear and High Energy Physics Materials science Annealing (metallurgy) Analytical chemistry Diethylene glycol Polymer Ion law.invention chemistry.chemical_compound chemistry law Polymer chemistry Thermal stability Irradiation Glass transition Electron paramagnetic resonance Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 131:198-204 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/s0168-583x(97)00138-9 |
| Popis: | The polymer poly(diethylene glycol bis(allyl carbonate)) (CR-39) subjected to γ-rays or ion beams (H, He, Li…) undergoes structural, physical and chemical modifications. The optical modifications of CR-39 irradiated by γ-rays or proton beams, and also the results of an EPR study of CR-39 under γ-rays are presented here. The latter showed that the increase of the refractive index observed in the irradiated polymer cannot be directly attributed to the presence of the free radicals in the material. The optical waveguides obtained by irradiation with proton beams present minimal losses of 2 dB/cm. They are exposed to thermal treatments in order to check their behaviour at temperatures around the glass transition temperature (Tg) of the unirradiated CR-39 polymer. This study showed that, on the range Tg − 10°C, Tg + 10°C, the obtained attenuation after the annealing treatment remains equal to its original value. Moreover, it pointed out the thermal stability of the refractive index. The first characterization results about microguides which were achieved using metallic masks and proton beams are also presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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