Bibliographic Details
| Title: |
Degradation of epoxy resins under high energy electron beam irradiation: Radio-oxidation |
| Authors: |
Longiéras, N.1,2, Sebban, M.1, Palmas, P.1 pascal.palmas@cea.fr, Rivaton, A.2 agnes.rivaton@univ-bpclermont.fr, Gardette, J.L.2 |
| Source: |
Polymer Degradation & Stability. Dec2007, Vol. 92 Issue 12, p2190-2197. 8p. |
| Subjects: |
Epoxy resins, Electron beams, Irradiation, Atmosphere, Helium, Nuclear magnetic resonance spectroscopy |
| Abstract: |
Abstract: The degradation of two epoxy systems exposed to electron beam irradiation in oxygen atmosphere has been studied and compared to our previous results obtained under helium atmosphere. A multi-scale approach to the degradation has been carried out using a variety of analytical methods including solid state NMR spectroscopy, 2D-WISE experiments, SEC measurements and infrared spectroscopy associated with chemical derivatisation treatments. It is shown that the degradation of both polymers is governed by radiolytic processes which involve chain scissions. The formation of oxidation products, mainly carboxylic acid chain ends, was shown at the surface of the irradiated film. Oxidative degradation is limited to the first 20μm of the film due to the low oxygen diffusion coefficient in epoxy polymers combined with the high dose rates of irradiation. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
